CN102561947B - Vibroflotation lead hole construction method based on pneumatic drill slag stirring - Google Patents

Vibroflotation lead hole construction method based on pneumatic drill slag stirring Download PDF

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Publication number
CN102561947B
CN102561947B CN 201210035360 CN201210035360A CN102561947B CN 102561947 B CN102561947 B CN 102561947B CN 201210035360 CN201210035360 CN 201210035360 CN 201210035360 A CN201210035360 A CN 201210035360A CN 102561947 B CN102561947 B CN 102561947B
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hole
mud
boring
construction
clay
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CN102561947A (en
Inventor
李全福
邓树密
向学忠
何开平
方成名
高建
王荣
钟永兵
冉龙武
杜林�
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Sinohydro Bureau 10 Co Ltd
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Sinohydro Bureau 10 Co Ltd
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Abstract

The invention discloses a vibroflotation lead hole construction method based on pneumatic drill slag stirring. The vibroflotation lead hole construction method includes steps of burying a protecting barrel; drilling a primary lead hole by a percussion drill with a hollow bit; connecting an air hose into an inner tube of the hollow bit and connecting the other end of the air hose with an outlet of an air compressor; starting the air compressor and the percussion drill and deeply drilling a hole downwards; adding water into the hole and continuously drilling the hole until the designed depth of the lead hole is achieved; and stopping drilling the hole and completing lead hole construction. The method is used for vibroflotation lead hole construction without mud stirring, so that building cost of temporary facilities for mud stirring, storing and the like of a mud system, service cost of mud stirring equipment and labor cost of mud stirring are saved, qualified clay can be omitted or used a little or unqualified clay can be used a little, and accordingly cost of the qualified clay or bentonite needed when mud is required to be stirred is remarkable reduced. Compared with a traditional method, the method has the advantages that the quantity of the used clay or bentonite is saved by about 80% to 90%, and drilling cost is saved by about 15% to 25%.

Description

Hole construction method is drawn in the punching of shaking based on pneumatic stirring boring mud
Technical field
The present invention relates to a kind of punching of shaking and draw hole construction method, relate in particular to a kind of punching of shaking based on pneumatic stirring boring mud and draw hole construction method.
Background technology
In civil construction project, the vibro replacement stone column engineering in Hydraulic and Hydro-Power Engineering particularly, the Main Function of vibro replacement stone column is soft stratum or liquescent sandy soil stratum to be encrypted to improve bearing capacity (mechanical property) or the anti-liquefying power of ground.But need the stratum of vibroflotation compaction itself or superstratum to exist more closely knit (hard) stratum or existence to float the stratum such as cobble, boulder, cause vibrating impacter directly pore-creating penetrate firm hard formation, and the mode that adopts Churn drill power traction hole penetrates and adopts after firm hard formation vibrating impacter pore-creating to carry out the filler vibration to the projected depth to encrypt pile again, and this method is the punching of shaking and draws hole construction method.
Traditional punching of shaking is drawn in hole construction method, generally adopts mud off, adopts direct circulation or instead circulates or take out mode that sand bucket takes out sand with outside boring mud tap in the hole, will constantly guarantee the supply of qualified mud for the collapse hole not of guaranteeing to hole.Slurry coat method generally adopts local tonerde or swell soil to mix system, and its cost is very high.If there is no satisfactory clay near the engineering location, need the qualified clay of long distance transportation or swell soil, cause using clay or bentonitic cost very high; In the bad or remote situation of the on-site transportation condition of engineering, the cost increase is especially obvious.
If adopt direct circulation or the anti-mode of slagging tap that circulates, to arrange at the construction field (site) a lot of circulation mud sumps, along with the variation of work plane will be removed mud sump and backfill at any time, and then arrange new mud sump; If adopt the mode that sand bucket is slagged tap of taking out, to arrange at the construction field (site) many plasma discharge ditches or mud sump, and to arrange the personnel of some and the mud boring mud of the interior eliminating of plant equipment cleaning hole, above these several slagging-off modes all make the management of job site increase certain difficulty, have increased corresponding Construction Cost.
Summary of the invention
Purpose of the present invention provides a kind of punching of shaking based on pneumatic stirring boring mud to draw hole construction method with regard to being in order to address the above problem.
In order to achieve the above object, the present invention has adopted following technical scheme:
The present invention includes following steps:
(1) bury underground and protect bucket;
(2) percussive drill that is hollow boring bit with drill bit gets out the elementary hole of drawing;
(3) access airduct in the inner tube of hollow boring bit, the other end of described airduct is connected with the outlet of air compressor machine;
(4) start air compressor machine and percussive drill, beginning is at the described elementary downward deep drilling in the hole that draws;
(5) add entry in the hole, lasting boring is to drawing the hole projected depth;
(6) stop boring, complete and draw the hole construction.
In the deep drilling process, the wind that air compressor machine is sent is suspended in mud boring mud and rolls in the hole, makes boring mud not precipitate; Mud is forming the mud skin in hole wall exosmosis process, in the hole, mud makes its density ratio larger because of deslagging not simultaneously, has also played very large retaining wall effect, so hole not can collapse hole; Jointly form slurry coat method after mixing with mud due to boring mud under the wind-force effect, so can not arrange or few waste discharge mud boring mud, reduced the expense of the artificial and plant equipment use of cleaning waste mud boring mud, reduce simultaneously the impact of environmental pollution, and improved the technical level of civilized construction.
As preferably, in described step (1), described to bury the degree of depth of protecting bucket underground be 1.3~2.0m, and the described barrel internal diameter that protects is greater than bore diameter 20~40cm; Burying underground when protecting barrel, it is closely knit that the gravel back-filling in layers will be mixed with clay in the described outside of protecting bucket; In described step (2), the described elementary degree of depth of drawing the hole is 3~5m; In described step (3), the internal diameter of described airduct is 25mm.
Particularly, in described step (5), the described water yield that adds entry in the hole meets the following conditions: in the hole denseness of boring mud slurries make drill bit in the hole freely up and down and and wind-force can blow the boring mud slurries and roll; In described step (5), if in the hole boring mud can not all be rolled in mud and at wind-force effect low suspension in mud, add clay in the hole, the clay amount that adds meets the following conditions: make in the hole boring mud all be rolled in mud and at wind-force effect low suspension in mud; In described step (4) and step (5), do not extract boring mud.
As optimal selection, in described step (6), the described method that stops holing is: first stop the impact of percussive drill, after proposing the drill bit of described percussive drill outside the hole, then close air compressor machine, stop air feed.
Further, the weight of described percussive drill hollow boring bit used is 2500~4000kg; The air quantity of described air compressor machine is 3~4m 3/ min, pressure are 0.7~1.2MPa.
Beneficial effect of the present invention is:
1, employing the present invention shakes to rush and draws the hole construction, roll in the hole, do not precipitate due to boring mud is suspended in mud, mud is forming the mud skin in hole wall exosmosis process, simultaneously in the hole, mud makes its density ratio larger because of deslagging not, therefore played very large retaining wall effect, boring can collapse hole yet;
2, mix the rear slurry coat method that jointly forms with mud due to boring mud under the wind-force effect, so can not arrange or few waste discharge mud boring mud, reduced the expense of the artificial and plant equipment use of cleaning waste mud boring mud, reduce simultaneously the impact of environmental pollution, and improved the technical level of civilized construction;
3, due to without stirred slurry, therefore saved the mud stirring of mud system and storage etc. and faced and build expenditure of construction and the cost of use of mud stirring equipment and the labour cost of mud stirring etc. of executing;
4, can use no or little qualified clay or use less underproof clay, therefore reduced significantly and need mix mud processed and use qualified clay or bentonitic expense, compare conventional method, can save and use clay or bentonitic quantity approximately 80~90%, save boring cost approximately 15~25%, bad, remote for transportation condition, local do not have again the object of construction production saving cost effectiveness of qualified clay more remarkable.
Description of drawings
Accompanying drawing is the Construction State schematic diagram that draws hole construction method based on the punching of shaking of pneumatic stirring boring mud of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is further described in detail:
By reference to the accompanying drawings, the present invention includes following steps:
(1) bury underground and protect bucket 5: burying underground and protecting bucket 5 the degree of depth is 1.3~2.0m, protects bucket 5 internal diameters greater than bore diameter 20~40cm; Protected bucket at 5 o'clock burying underground, protecting bucket 5 outside, to mix the gravel back-filling in layers with clay closely knit.
(2) percussive drill that is hollow boring bit 4 with drill bit gets out the elementary hole of drawing, and the elementary degree of depth of drawing the hole is 3~5m, enters with the top of hollow boring bit 4 and elementaryly draws that in the hole, 1.0~1.5m is advisable; The weight of hollow boring bit 4 is 2500~4000kg.
(3) access airduct 2 in the inner tube of hollow boring bit 4, the internal diameter of airduct 2 is 25mm, the other end of airduct 2 is connected with the outlet of air compressor machine 1; Being advisable apart from the bottom 1.5m of hollow boring bit 4 left and right in the bottom of airduct 2, extends to air compressor machine 1 outside the hole at the top of hollow boring bit 4 with hard plastic tube or high-pressure air hose; The air quantity of air compressor machine 1 is 3~4m3/min, and pressure is 0.7~1.2MPa.
(4) start air compressor machine 1 and percussive drill, beginning is at the elementary deep drilling downwards that draws in the hole.
(5) add entry in the hole, lasting boring is to drawing the hole projected depth; Add the water yield of entry in the hole, meet the following conditions: in the hole, the denseness of boring mud slurries 3 makes hollow boring bit 4 freely up and down and wind-force in the hole can blow boring mud slurries 3 to roll; In boring procedure, if in the hole boring mud can not all be rolled in mud and at wind-force effect low suspension in mud, add clay in the hole, the clay amount that adds meets the following conditions: make in the hole boring mud all be rolled in mud and at wind-force effect low suspension in mud; In boring procedure, do not extract boring mud, can be according to actual conditions discharge section boring mud slurries 3.
(6) stop boring, complete and draw the hole construction; Its process is: first stop the impact of percussive drill, will rush
After the hollow boring bit 4 that hits rig proposes outside the hole, then close air compressor machine 1, stop air feed.
By reference to the accompanying drawings, in the deep drilling process, the wind that air compressor machine 1 is sent is suspended in boring mud and forms boring mud slurries 3 in mud in the hole, and boring mud slurries 3 do not stop to roll, and make boring mud not precipitate; Mud is forming the mud skin in hole wall exosmosis process, in the hole, mud makes its density ratio larger because of deslagging not simultaneously, has also played very large retaining wall effect, so hole not can collapse hole; Because boring mud and the mixed boring mud slurries 3 of mud form slurry coat method under the wind-force effect, so can not arrange or few waste discharge mud boring mud, reduced the expense of the artificial and plant equipment use of cleaning waste mud boring mud, reduce simultaneously the impact of environmental pollution, and improved the technical level of civilized construction.

Claims (3)

1. hole construction method is drawn in the punching of shaking based on pneumatic stirring boring mud, comprises the following steps:
(1) bury underground and protect bucket;
(2) percussive drill that is hollow boring bit with drill bit gets out the elementary hole of drawing;
(3) access airduct in the inner tube of hollow boring bit, the other end of described airduct is connected with the outlet of air compressor machine;
(4) start air compressor machine and percussive drill, beginning is at the described elementary downward deep drilling in the hole that draws;
(5) add entry in the hole, lasting boring is to drawing the hole projected depth;
(6) stop boring, complete and draw the hole construction;
It is characterized in that: in described step (5), the described water yield that adds entry in the hole meets the following conditions: in the hole, the denseness of boring mud slurries makes drill bit freely up and down and wind-force in the hole can blow the boring mud slurries to roll.
2. hole construction method is drawn in the punching of shaking based on pneumatic stirring boring mud according to claim 1, it is characterized in that: in described step (5), if in the hole boring mud can not all be rolled in mud and at wind-force effect low suspension in mud, add clay in the hole, the clay amount that adds meets the following conditions: make in the hole boring mud all be rolled in mud and at wind-force effect low suspension in mud.
3. hole construction method is drawn in the punching of shaking based on pneumatic stirring boring mud according to claim 1, it is characterized in that: in described step (4) and step (5), do not extract boring mud.
CN 201210035360 2012-02-17 2012-02-17 Vibroflotation lead hole construction method based on pneumatic drill slag stirring Active CN102561947B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105862708A (en) * 2016-04-26 2016-08-17 北京振冲工程机械有限公司 Down-the-hole hammer and guide hole matched construction method for vibro-replacement stone column composite foundation

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU681154A2 (en) * 1978-04-14 1979-08-25 Днепропетровский Институт Железнодорожного Транспорта Им. М.И.Калинина Device for placing concrete in boreholes
CN101109179A (en) * 2007-06-21 2008-01-23 河北建设勘察研究院有限公司 Gas lifting reverse circulation porus cleaning construction method for slurry bulkhead cast-in-situ bored pile
CN101831906A (en) * 2009-03-09 2010-09-15 钱圣德 Dry type pneumatic rock drilling pile-driving machine and working method thereof
CN202000342U (en) * 2011-02-18 2011-10-05 史政 High air pressure pneumatic impact rock penetrating and inserting device for continuous flight auger

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57100217A (en) * 1980-12-12 1982-06-22 Shimizu Constr Co Ltd Refilling work for vacant area of concrete pile driven in site
JPS62194323A (en) * 1986-02-20 1987-08-26 Ohbayashigumi Ltd Slime discharging for mud-water excavation work

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU681154A2 (en) * 1978-04-14 1979-08-25 Днепропетровский Институт Железнодорожного Транспорта Им. М.И.Калинина Device for placing concrete in boreholes
CN101109179A (en) * 2007-06-21 2008-01-23 河北建设勘察研究院有限公司 Gas lifting reverse circulation porus cleaning construction method for slurry bulkhead cast-in-situ bored pile
CN101831906A (en) * 2009-03-09 2010-09-15 钱圣德 Dry type pneumatic rock drilling pile-driving machine and working method thereof
CN202000342U (en) * 2011-02-18 2011-10-05 史政 High air pressure pneumatic impact rock penetrating and inserting device for continuous flight auger

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Inventor after: Li Quanfu

Inventor after: Du Lin

Inventor after: Deng Shumi

Inventor after: Xiang Xuezhong

Inventor after: He Kaiping

Inventor after: Fang Chengming

Inventor after: Gao Jian

Inventor after: Wang Rong

Inventor after: Zhong Yongbing

Inventor after: Ran Longwu

Inventor before: Li Quanfu

Inventor before: Deng Shumi

C53 Correction of patent for invention or patent application
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Free format text: CORRECT: INVENTOR; FROM: LI QUANFU DENG SHUMI TO: LI QUANFU DENG SHUMI XIANG XUEZHONG HE KAIPING FANG CHENGMING GAO JIAN WANG RONG ZHONG YONGBING RAN LONGWU DU LIN

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