CN101029559B - Long-spiral replaceable and extruded borehole construction - Google Patents
Long-spiral replaceable and extruded borehole construction Download PDFInfo
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- CN101029559B CN101029559B CN200710065418A CN200710065418A CN101029559B CN 101029559 B CN101029559 B CN 101029559B CN 200710065418 A CN200710065418 A CN 200710065418A CN 200710065418 A CN200710065418 A CN 200710065418A CN 101029559 B CN101029559 B CN 101029559B
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Abstract
A construction method follows the steps as: select proper driving head, spiral auger and star-pattern drilling bit according to the depth of the stone layer and pile length; drilling at low speed to designed position; Upon reaching the stone layer, move out the drill; fill clay back to the hole till above the stone layer; install a clay pressing device to the helical lobe on the spiral auger; drill in again till designed position; move out the drill and put in reinforce cage and concrete.
Description
Technical field
The present invention relates to the drilling construction method of slope protection pile in a kind of deep foundation pit support engineering, particularly a kind of long-spiral replaceable and extruded borehole construction.
Background technology
Along with the continuous development of urban architecture, the bodily form of building is also constantly developing to super largeization, superelevationization, super in-depth.Because the progressively intensification of the excavation of foundation pit degree of depth, the difficulty of its pattern foundation pit supporting structure is also increasing, especially at the west of Beijing area half ubiquity one deck sand pebble layer, be characterized in that thickness is big, density is high, particle diameter is big, the big difficulty of bringing for the pore-forming of long-spiral drilling machine, make many engineerings can't adopt long-spiral drilling machine to carry out pore-forming, have to adopt other hole forming method.How to improve the pore-forming technique of long-spiral drilling machine, the application that makes it in sand pebble layer is expanded, and is the key that improves the long-spiral drilling machine function of use.
From early eighties, the drilling construction of slope protection pile generally adopts hand excavated pile in the deep foundation pit support engineering of Beijing area, as long as the quality control on construction of retaining wall is good, pore-forming is no problem in sand pebble layer when running into sand pebble layer.Because soil body landslide in the hole often takes place in hand excavated pile in work progress, retaining wall caves in, accidents such as thing, toxic gas are weighed down in the aperture, in view of there being more problem aspect the construction safety, Beijing relevant department has taked the hand excavated pile license granting mechanisms in the early 1990s, begin to limit the construction of hand excavated pile, encourage to adopt mechanical hole building.
The job practices of long spiral pore-forming begins progressively to promote in the nineties, easy construction, speed are fast because long-spiral drilling machine construction has, friction, noiselessness, characteristics such as pollution-free, have therefore obtained using more widely in the foundation pit supporting project construction.But continuous intensification along with the Beijing area excavation of foundation pit degree of depth, it is more and more darker that the long-spiral drilling machine pore-forming enters the degree of depth of sand pebble layer, therefore the density and the particle diameter of cobble is also increasing in the sand pebble layer, makes that long-spiral drilling machine difficulty of pore-forming in sand pebble layer is more and more higher.Concrete distribution situation is that relatively difficulty of long spiral pore-forming is adopted usually because the buried depth of sand pebble layer is superficial, and the density of cobble and size ratio are bigger in the sand pebble layer in area to the west of the Wu Ke Song, generally adopts modes such as manually digging hole, impact holing.The Wu Ke Song is with in this zone to the west of the street, Xidan, the buried depth of sand pebble layer is generally about 10.00～15.00M, some local still sand pebble layer and argillic horizon are mutual, there is the multilayer sand pebble layer, after long spiral depth of pore forming surpasses 15.00～20.00M (counting) from natural ground, the penetration rate of rig drilling construction is more and more slower, and the difficulty of pore-forming is more and more higher.The long-spiral drilling machine subject matter that pore-forming runs in sand pebble layer has:
1, the content of cobble is higher in the sand pebble layer, and drilling tool is drilling depth not;
2, when cobble particle diameter in the sand pebble layer was big, the cobble band of big particle diameter did not come up in the pore forming process, often causes bit bouncing, bit freezing phenomenon;
3, when sand pebble layer is thicker, relatively poor because of its self-support, it is serious to put forward the hole phenomenon of collapsing behind the brill;
4, when containing a small amount of backwater or residual water in the sand pebble layer, very easily form quicksand, the stake hole hole phenomenon of collapsing is serious, and the slope protection pile drilling construction is difficulty very.
Summary of the invention
The objective of the invention is to solve the deficiency and the defective of the drilling construction method of slope protection pile in the domestic existing deep foundation pit support engineering, propose a kind of can be by large diameter cobble being extruded into both sides and being discharged from, and guarantee that hole wall is stable, slick and sly, be not prone to phenomenons such as the hole of collapsing, bulge, reduce construction cost, reduced the long-spiral replaceable and the extruded borehole construction that in sand pebble layer, adopt the potential safety hazard of manual digging pile construction in the past.
Long-spiral replaceable of the present invention and extruded borehole construction comprise following processing step:
1) selects unit head and the long screw drill rod and the cross bit of corresponding power according to the length of the buried depth of boulder bed, thickness, slope protection pile, the degree of depth that slope protection pile enters boulder bed;
2) begin to creep into according to design attitude, when creeping into, the size of strict control electric current keeps the slow-speed of revolution, to guarantee bigger moment of torsion;
3) enter the boulder bed of certain depth after, drilling rod is all proposed;
4) detect the hole wall quality of being holed, measure the particular location of hole void;
5) clay backfilling gone into hole, the degree of depth will be filled to more than the whole boulder bed;
6) the soil compaction device is installed on the helical blade with the corresponding long screw drill rod in the pertusate position of hole wall, the soil compaction device be shaped as the cambered surface sheet, the bottom is provided with two and connects leg, each connect have on leg with helical blade on the soil compaction device that adapts of blade through hole through hole is installed, cross bit comprises the flat main drill lip of isosceles triangle, on each face of main drill lip, be provided with the flat secondary drill lip of a right-angled triangle, the long right-angle side of secondary drill lip and the central lines of main drill lip, the length of secondary drill lip is less than the length of main drill lip, the width of described secondary drill lip is less than the width of described main drill lip, the drift angle of described main drill lip is 40 °～70 °, on two waists of the isosceles triangle of main drill lip carbide chip is installed, stagger mutually in the position of the carbide chip on two waists, on the hypotenuse of each secondary drill lip carbide chip is installed, stagger mutually in the carbide chip position of installing on the hypotenuse of two secondary drill lips, with drilling rod put into once more hole, start rig and make brill under the drilling rod, when drilling to completion, drilling rod is all proposed;
7) reinforcing cage is positioned over hole;
8) placing of concrete.
Long-spiral replaceable of the present invention and extruded borehole construction, at described processing step 1) in long screw drill rod be special-shaped tower drilling rod, all less than a last joint, the pitch of helical blade all equates the external diameter of every joint core pipe of drilling rod on every joint core pipe, and width is all greater than a last joint.
Compared with prior art, long-spiral replaceable of the present invention and extruded borehole construction, can large diameter cobble be extruded into both sides by cross bit, the special-shaped tower drilling rod formed of the blade of core pipe by different-diameter and different in width is brought the cobble of different-grain diameter up again, to replace used the banketing of cobble simultaneously inserts in the hole, by the soil compaction device that is installed on the helical blade clay in the hole is pushed again, make the clay around the stake hole obtain compacted, stable, slick and sly to guarantee hole wall, solved the problem of hole wall collapse.Use long-spiral replaceable of the present invention and extruded borehole construction, carry out the construction of slope protection pile, the hole wall slyness of its slope protection pile, regular, be not prone to phenomenons such as the hole of collapsing, bulge, make that the fullness coefficient of pile concrete is less, save pile concrete, reduced construction cost, reduced the potential safety hazard that in the past in sand pebble layer, adopts manual digging pile construction.
Other details of long-spiral replaceable of the present invention and extruded borehole construction and characteristics can hereinafter and in conjunction with the accompanying drawings the embodiment of detailed description just can be cheer and bright by reading.
Description of drawings
Front view when Fig. 1 is unkitted the soil compaction device for long-spiral replaceable of the present invention and the employed rig of extruded borehole construction;
Left view when Fig. 2 is unkitted the soil compaction device for long-spiral replaceable of the present invention and the employed rig of extruded borehole construction;
Vertical view when Fig. 3 is unkitted the soil compaction device for long-spiral replaceable of the present invention and the employed rig of extruded borehole construction;
Upward view when Fig. 4 is unkitted the soil compaction device for long-spiral replaceable of the present invention and the employed rig of extruded borehole construction;
Schematic diagram when Fig. 5 loads onto the soil compaction device for long-spiral replaceable of the present invention and the employed rig of extruded borehole construction;
Fig. 6 is that the A-A of Fig. 5 is to sectional view;
Fig. 7 is a kind of structural representation of soil compaction device;
Fig. 8 is the vertical view of Fig. 7;
Fig. 9 is the stereogram of soil compaction device;
Figure 10 installs the soil compaction schematic representation of apparatus of another kind of structure for Fig. 6;
Figure 11 is the schematic diagram of punching displacement cobble in long-spiral replaceable of the present invention and the extruded borehole construction;
The schematic diagram of Figure 12 for banketing in long-spiral replaceable of the present invention and the extruded borehole construction;
Figure 13 is the schematic diagram of soil compaction in long-spiral replaceable of the present invention and the extruded borehole construction.
The specific embodiment
As shown in Figure 1, the employed rig of long-spiral replaceable of the present invention and extruded borehole construction comprises drill bit and long screw drill rod 2.Long screw drill rod 2 is special-shaped tower drilling rod, and all less than a last joint, the pitch of helical blade 21 all equates the external diameter of every joint core pipe 23 on every joint core pipe 23, and width is all greater than a last joint.Have blade through hole 211 on the helical blade 21 of long screw drill rod 2, long-spiral replaceable and extruded borehole rig also are provided with soil compaction device 3, and soil compaction device 3 is removably mounted on the helical blade 21 by the through hole on the helical blade 21.Soil compaction device 3 be shaped as the cambered surface sheet, the bottom is provided with two and connects legs 31, each connect have on leg 31 with helical blade 21 on the soil compaction device that adapts of blade through hole 211 through hole 301 is installed.Drill bit is a cross bit 1, cross bit 1 comprises the flat main drill lip 11 of isosceles triangle, on main drill lip 11 each face, be provided with the flat secondary drill lip 12 of a right-angled triangle, the long right-angle side of secondary drill lip 12 and the central lines of main drill lip 11, the length of secondary drill lip 12 is less than the length of main drill lip 11, the width of described secondary drill lip 12 is less than the width of described main drill lip 11, and the drift angle of described main drill lip 11 is 40 °～70 °.On two waists of the isosceles triangle of main drill lip 11 carbide chip 111 is installed, stagger mutually in the position of the carbide chip 111 on two waists, carbide chip 121 positions of installing on the hypotenuse of 121, two secondary drill lips 12 of carbide chip are installed on the hypotenuse of each secondary drill lip 12 staggers mutually.
Long-spiral replaceable of the present invention and extruded borehole construction are constructed according to following steps in use:
1) selects unit head and the long screw drill rod 2 and the cross bit 1 of corresponding power according to the length of the buried depth of boulder bed, thickness, slope protection pile, the degree of depth that slope protection pile enters boulder bed;
2) begin to creep into according to design attitude, when creeping into, the size of strict control electric current keeps the slow-speed of revolution, to guarantee bigger moment of torsion;
3) enter the boulder bed of certain depth after, drilling rod 2 is all proposed;
4) detect the hole wall quality of being holed, measure the particular location of hole void;
5) clay backfilling gone into hole, the degree of depth will be filled to more than the whole boulder bed;
6) soil compaction device 3 is installed on the helical blade 21 with the corresponding long screw drill rod 2 in the pertusate position of hole wall, with drilling rod 2 put into once more hole, start rig drilling rod is bored for 2 times, when drilling to completion, drilling rod 2 is all proposed;
7) reinforcing cage is positioned over hole;
8) placing of concrete.
Embodiment recited above is described preferred implementation of the present utility model; be not that design of the present utility model and scope are limited; do not breaking away under the utility model design scheme prerequisite; common engineers and technicians make the technical solution of the utility model in this area various modification and improvement; all should fall into protection domain of the present utility model; the technology contents that the utility model is asked for protection all is documented in claims.
Claims (2)
1. long-spiral replaceable and extruded borehole construction is characterized in that: comprise following processing step:
1) selects unit head and the long screw drill rod and the cross bit of corresponding power according to the length of the buried depth of boulder bed, thickness, slope protection pile, the degree of depth that slope protection pile enters boulder bed;
2) begin to creep into according to design attitude, when creeping into, the size of strict control electric current keeps the slow-speed of revolution, to guarantee bigger moment of torsion;
3) enter the boulder bed of certain depth after, drilling rod is all proposed;
4) detect the hole wall quality of being holed, measure the particular location of hole void;
5) clay backfilling gone into hole, the degree of depth will be filled to more than the whole boulder bed;
6) the soil compaction device is installed on the helical blade with the corresponding long screw drill rod in the pertusate position of hole wall, the soil compaction device be shaped as the cambered surface sheet, the bottom is provided with two and connects leg, each connect have on leg with helical blade on the soil compaction device that adapts of blade through hole through hole is installed, cross bit comprises the flat main drill lip of isosceles triangle, on each face of main drill lip, be provided with the flat secondary drill lip of a right-angled triangle, the long right-angle side of secondary drill lip and the central lines of main drill lip, the length of secondary drill lip is less than the length of main drill lip, the width of described secondary drill lip is less than the width of described main drill lip, the drift angle of described main drill lip is 40 °～70 °, on two waists of the isosceles triangle of main drill lip carbide chip is installed, stagger mutually in the position of the carbide chip on two waists, on the hypotenuse of each secondary drill lip carbide chip is installed, stagger mutually in the carbide chip position of installing on the hypotenuse of two secondary drill lips, with drilling rod put into once more hole, start rig and make brill under the drilling rod, when drilling to completion, drilling rod is all proposed;
7) reinforcing cage is positioned over hole;
8) placing of concrete.
2. long-spiral replaceable according to claim 1 and extruded borehole construction, it is characterized in that: at described processing step 1) in long screw drill rod be special-shaped tower drilling rod, the external diameter of every joint core pipe of drilling rod is all less than a last joint, the pitch of helical blade all equates on every joint core pipe, and width is all greater than a last joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710065418A CN101029559B (en) | 2007-04-13 | 2007-04-13 | Long-spiral replaceable and extruded borehole construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710065418A CN101029559B (en) | 2007-04-13 | 2007-04-13 | Long-spiral replaceable and extruded borehole construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101029559A CN101029559A (en) | 2007-09-05 |
| CN101029559B true CN101029559B (en) | 2010-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200710065418A Expired - Fee Related CN101029559B (en) | 2007-04-13 | 2007-04-13 | Long-spiral replaceable and extruded borehole construction |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101545746B (en) * | 2009-05-06 | 2012-04-25 | 中铁二局股份有限公司 | Method for smooth blasting construction with pre-eccentric uncoupling charging |
| CN101858199B (en) * | 2010-05-20 | 2014-03-05 | 中冶建筑研究总院有限公司 | Soil extrusion amount controllable bidirectional spiral extruding and expanding drill |
| CN102011546A (en) * | 2010-11-11 | 2011-04-13 | 河北建设勘察研究院有限公司 | Large-diameter engineering well holing construction method in super-thick pebble formation |
| CN105135961A (en) * | 2015-08-13 | 2015-12-09 | 中铁隧道集团有限公司 | Drilling blasting method of thin layer structured hard soft rock tunnel |
| CN107842313B (en) * | 2017-11-28 | 2019-04-30 | 重庆华硕建设有限公司 | A kind of rotary drilling rig compact making hole construction technology |
| CN108086910A (en) * | 2018-01-18 | 2018-05-29 | 北京地矿工程建设有限责任公司 | Long spire extruded and extended pile drilling machine boring method and long spire extruded and extended pile drilling machine |
| CN109723393A (en) * | 2019-02-25 | 2019-05-07 | 刘守进 | A kind of spiral is at hole drill tool and bore forming method |
| CN109944251B (en) * | 2019-03-15 | 2021-07-06 | 深圳市工勘岩土集团有限公司 | Hole guiding construction method for driving soft rock stratum steel sheet pile |
| CN109882094A (en) * | 2019-04-12 | 2019-06-14 | 奥瑞拓能源科技股份有限公司 | Self-propelled drill pipe tool |
| CN112144514A (en) * | 2020-09-30 | 2020-12-29 | 北京建材地质工程有限公司 | Simple method for forming hole and pile in sand and pebble stratum easy to collapse during rotary drilling machine |
-
2007
- 2007-04-13 CN CN200710065418A patent/CN101029559B/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 孙方玉.浅谈长螺旋钻机、旋挖钻机钻孔技术在煤矿建设桩基工程中的运用.山东煤炭科技 4.2006,(4),7-8. |
| 孙方玉.浅谈长螺旋钻机、旋挖钻机钻孔技术在煤矿建设桩基工程中的运用.山东煤炭科技 4.2006,(4),7-8. * |
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| CN101029559A (en) | 2007-09-05 |
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Granted publication date: 20100519 Termination date: 20170413 |
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