CN104452752A - Construction method for cement mixing pile in high-dense hardening clay layer - Google Patents
Construction method for cement mixing pile in high-dense hardening clay layer Download PDFInfo
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- CN104452752A CN104452752A CN201410693620.8A CN201410693620A CN104452752A CN 104452752 A CN104452752 A CN 104452752A CN 201410693620 A CN201410693620 A CN 201410693620A CN 104452752 A CN104452752 A CN 104452752A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to the field of cement mixing pile construction, in particular to a construction method for a cement mixing pile in a high-dense hardening clay layer. The construction method for the cement mixing pile in the high-dense hardening clay layer comprises the step one of flushing and hole forming, wherein pile position lofting, pile machine locating and drilling for hole forming are involved; the step two of mixing and pile forming, wherein pile machine locating, slurry preparing, jet mixing drilling and jet mixing promoting are involved. The method has the advantages of avoiding jamming and stalling of a drill bit in the construction process, and reducing the probability of damage to equipment while ensuring the work progress.
Description
Technical field
The present invention relates to cement-soil stirring pile construction field, specifically the construction method that hardens in clay layer in high densification of a kind of cement mixing method.
Background technology
Often the engineering geology of the clay layer that to harden containing high densification can be run at cement-soil stirring pile construction; in cement-soil stirring pile construction process the paramount densification of bit drills harden clay layer time be difficult to continue to creep into; time have card turn, stall phenomenon occur; the harmful effect such as cause device damage, engineering delays; so a kind of construction method of exigence solves the problems referred to above.
Summary of the invention
Technical problem to be solved by this invention is to provide the construction method that a kind of cement mixing method avoiding drill bit bit freezing in work progress, stall phenomenon to occur hardens in clay layer in high densification, also reduces the probability of device damage while ensure that programming.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: the construction method that a kind of cement mixing method hardens in clay layer in high densification, comprises the following steps:
Step one, bath pore-forming:
A) stake position setting-out, the piling plan according to polygon control survey point and design drawing releases mattress layer outer edge with total powerstation, then span makes stake position, then inserts timber and marks;
B) position of p ile machine, moves on to mark position by stake machine, makes drill center aim at described stake position, carries out rig leveling after driller insertion;
C) drilling and forming hole, injects water, starts mortar pump in mortar pump, and outlet pressure keeps 0.4 ~ 0.6Mpa, and unlatching stake machine is rotated down and creeps into into stake holes;
Step 2, stirs pile:
A) position of p ile machine, moves on to the position of stake holes by stake machine, rig changes drill for boring stake drill bit, makes brill stake bit central aim at the hole heart of described stake holes, carries out rig leveling after driller insertion;
B) slurries preparation, adopts Portland cement, and controlling water/binder ratio is that 1:1 carries out cement paste uniform stirring, and detects cement grout proportion at any time, and the cement grout got ready need not stop to stir, and makes it uniform and stable, and by standby for this cement grout suction aggregate bin spray.
C) spray is stirred and is crept into, the cement grout got ready is injected in mortar pump, start mortar pump, outlet pressure keeps 0.4 ~ 0.6MPa, when cement grout sprays from nozzle, startup stake machine is rotated down and creeps into, determine that creeping into arrival underground 20cm starts whitewashing according to drilling rod mark, and whitewashing is stirred at the bottom of stake, carries out mill stake end;
D) lifting is stirred in spray, and whitewashing limit, mixer limit promotes stirs, and hoisting velocity is tightly connected with whitewashing amount, and hoisting velocity is not more than 0.8m/min, until pile.
The invention has the beneficial effects as follows: in the engineering geology of the clay layer that hardens containing high densification, utilize described bath pore formation step, this project geology first gets out stake holes, make cement mixing method at the smooth pile of this project geology, avoid drill bit bit freezing in work progress, stall phenomenon, while ensure that programming, also reduce the probability of device damage.
On the basis of technique scheme, the present invention can also do following improvement.
Further, consider the reliability promoting described rig leveling, the leveling mode of rig leveling described in step one neutralization procedure two is for regulating hydraulic leg, adjustment stake machine platform, make it level, front and back spirit level controls, left and right plummet controls, and ensures that rig perpendicularity deviation is no more than 1%.
Further, consider the stability promoting pile of the present invention, the diameter of drill is less than the diameter of described brill stake drill bit.
Further, consider the reliability promoting stake formed by the present invention, the curing compound strength grade of Portland cement described in step 2 is 42.5Mpa.
Further, consider and make to spray into cement grout in soil and soil stirs, spray described in step 2 is stirred and is promoted after operation completes, and again sinks in soil by rotation limit, mixer limit, carries out whole process and stir remixing again, guarantee the reliability of stake.
Further, consider and guarantee described spray to stir the mill stake end creeping into operation to carry out thorough and shaping stake end reliability high, the mill stake end whitewashing of creeping into operation is stirred in spray described in step 2, and to stir duration be 30 seconds.
Accompanying drawing explanation
Fig. 1 is flow chart of the present invention;
Detailed description of the invention
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
As shown in Figure 1, the construction method that a kind of cement mixing method hardens in clay layer in high densification, with designing pile length 12m, stake footpath 0.6m, the one's mind is pure spacing 1.5m of stake is example, comprises the following steps:
Step one, bath pore-forming:
A) stake position setting-out, the piling plan according to polygon control survey point and design drawing releases mattress layer outer edge with total powerstation, then makes stake position with taped measurement, then inserts timber and spills lime point to mark;
B) position of p ile machine, moves on to mark position by stake machine, and make the long drill center of 0.2m aim at described stake position, error is not more than 50mm, carries out rig leveling after driller insertion;
C) drilling and forming hole, injects water, starts mortar pump in mortar pump, and outlet pressure keeps 0.4 ~ 0.6Mpa, and unlatching stake machine is rotated down and creeps into into stake holes;
Step 2, stirs pile:
A) position of p ile machine, moves on to the position of stake holes by stake machine, rig changes drill for boring stake drill bit, and boring stake bit diameter is 0.6m, and make brill stake bit central aim at the hole heart of described stake holes, error is not more than 50mm, carries out rig leveling after driller insertion;
B) slurries preparation, adopts Portland cement, and controlling water/binder ratio is that 1:1 carries out cement paste uniform stirring, and detects cement grout proportion at any time, and the cement grout got ready need not stop to stir, and makes it uniform and stable, and by standby for this cement grout suction aggregate bin spray.
C) spray is stirred and is crept into, the cement grout got ready is injected in mortar pump, start mortar pump, outlet pressure keeps 0.4 ~ 0.6MPa, when cement grout sprays from nozzle, startup stake machine is rotated down and creeps into, determine that creeping into arrival underground 20cm starts whitewashing according to drilling rod mark, and whitewashing is stirred at the bottom of stake, carries out mill stake end;
D) lifting is stirred in spray, and whitewashing limit, mixer limit promotes stirs, and hoisting velocity is tightly connected with whitewashing amount, and hoisting velocity equals 0.8m/min, until pile.
In the present embodiment, the leveling mode of rig leveling described in step one neutralization procedure two is for regulating hydraulic leg, and adjust stake machine platform, make it level, front and back spirit level controls, and left and right plummet controls, and ensures that rig perpendicularity deviation is no more than 1%; The diameter of drill is less than the diameter of described brill stake drill bit; The curing compound strength grade of Portland cement described in step 2 is 42.5Mpa; Spray described in step 2 is stirred and is promoted after operation completes, and again sinks in soil by rotation limit, mixer limit, carries out whole process and stir remixing again; It is 30 seconds that the mill stake end whitewashing stirring duration creeping into operation is stirred in spray described in step 2.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. the construction method that hardens in clay layer in high densification of cement mixing method, is characterized in that, comprise the following steps:
Step one, bath pore-forming:
A) stake position setting-out, the piling plan according to polygon control survey point and design drawing releases mattress layer outer edge with total powerstation, then span makes stake position, then inserts timber and marks;
B) position of p ile machine, moves on to mark position by stake machine, makes drill center aim at described stake position, carries out rig leveling after driller insertion;
C) drilling and forming hole, injects water, starts mortar pump in mortar pump, and outlet pressure keeps 0.4 ~ 0.6Mpa, and unlatching stake machine is rotated down and creeps into into stake holes;
Step 2, stirs pile:
A) position of p ile machine, moves on to the position of stake holes by stake machine, rig changes drill for boring stake drill bit, makes brill stake bit central aim at the hole heart of described stake holes, carries out rig leveling after driller insertion;
B) slurries preparation, adopts Portland cement, and controlling water/binder ratio is that 1:1 carries out cement paste uniform stirring, and detects cement grout proportion at any time, and the cement grout got ready need not stop to stir, and makes it uniform and stable, and by standby for this cement grout suction aggregate bin spray;
C) spray is stirred and is crept into, the cement grout got ready is injected in mortar pump, start mortar pump, outlet pressure keeps 0.4 ~ 0.6MPa, when cement grout sprays from nozzle, startup stake machine is rotated down and creeps into, determine that creeping into arrival underground 20cm starts whitewashing according to drilling rod mark, and whitewashing is stirred at the bottom of stake, carries out mill stake end;
D) lifting is stirred in spray, and whitewashing limit, mixer limit promotes stirs, and hoisting velocity is tightly connected with whitewashing amount, and hoisting velocity is not more than 0.8m/min, until pile.
2. the construction method that hardens in clay layer in high densification of a kind of cement mixing method according to claim 1, it is characterized in that, the leveling mode of rig leveling described in step one neutralization procedure two is for regulating hydraulic leg, adjustment stake machine platform, make it level, front and back spirit level controls, and left and right plummet controls, and ensures that rig perpendicularity deviation is no more than 1%.
3. the construction method that hardens in clay layer in high densification of a kind of cement mixing method according to claim 1, it is characterized in that, the diameter of described drill is less than the diameter of described brill stake drill bit.
4. the construction method that hardens in clay layer in high densification of a kind of cement mixing method according to claim 1, it is characterized in that, the curing compound strength grade of Portland cement described in step 2 is 42.5Mpa.
5. the construction method that hardens in clay layer in high densification of a kind of cement mixing method according to claim 1, is characterized in that, spray described in step 2 is stirred and promoted after operation completes, and again sinks in soil by rotation limit, mixer limit, carries out whole process and stir remixing again.
6. the construction method that a kind of cement mixing method according to any one of claim 1 to 5 hardens in clay layer in high densification, is characterized in that, it is 30 seconds that the mill stake end whitewashing stirring duration creeping into operation is stirred in spray described in step 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410693620.8A CN104452752A (en) | 2014-11-27 | 2014-11-27 | Construction method for cement mixing pile in high-dense hardening clay layer |
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| CN201410693620.8A CN104452752A (en) | 2014-11-27 | 2014-11-27 | Construction method for cement mixing pile in high-dense hardening clay layer |
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| CN104452752A true CN104452752A (en) | 2015-03-25 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104947655A (en) * | 2015-05-14 | 2015-09-30 | 中国能源建设集团广东电力工程局有限公司 | Construction technology and equipment for cement mixing pile |
| CN110700249A (en) * | 2019-09-19 | 2020-01-17 | 江苏劲桩基础工程有限公司 | Construction method of high-compactness clay forced-expansion composite pile |
| CN113338273A (en) * | 2021-05-21 | 2021-09-03 | 南京市水利建筑工程有限公司 | Stirring pile construction method based on water-rich organic matter soft soil layer river channel |
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| CN101899950A (en) * | 2010-07-14 | 2010-12-01 | 中国矿业大学 | Method for hydraulically drilling high-stress coal |
| JP2013209796A (en) * | 2012-03-30 | 2013-10-10 | Shinsei Komu:Kk | Pile reinforcement structure constructing method and apparatus therefor |
| CN103422497A (en) * | 2013-08-21 | 2013-12-04 | 国家电网公司 | Method for reinforcing soft soil foundation by using cement-soil mixing pile |
| CN103603345A (en) * | 2013-10-31 | 2014-02-26 | 周兆弟 | Cement mixing grouting pile foundations and forming method |
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2014
- 2014-11-27 CN CN201410693620.8A patent/CN104452752A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101899950A (en) * | 2010-07-14 | 2010-12-01 | 中国矿业大学 | Method for hydraulically drilling high-stress coal |
| JP2013209796A (en) * | 2012-03-30 | 2013-10-10 | Shinsei Komu:Kk | Pile reinforcement structure constructing method and apparatus therefor |
| CN103422497A (en) * | 2013-08-21 | 2013-12-04 | 国家电网公司 | Method for reinforcing soft soil foundation by using cement-soil mixing pile |
| CN103603345A (en) * | 2013-10-31 | 2014-02-26 | 周兆弟 | Cement mixing grouting pile foundations and forming method |
Non-Patent Citations (2)
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| 刘学墉: "《灌注桩基础设计》", 31 January 1989, 河南科学技术出版社 * |
| 郭讨论: "水泥深层搅拌桩施工技术", 《山西建筑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104947655A (en) * | 2015-05-14 | 2015-09-30 | 中国能源建设集团广东电力工程局有限公司 | Construction technology and equipment for cement mixing pile |
| CN110700249A (en) * | 2019-09-19 | 2020-01-17 | 江苏劲桩基础工程有限公司 | Construction method of high-compactness clay forced-expansion composite pile |
| CN113338273A (en) * | 2021-05-21 | 2021-09-03 | 南京市水利建筑工程有限公司 | Stirring pile construction method based on water-rich organic matter soft soil layer river channel |
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Application publication date: 20150325 |
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