CN101705684A - Method for sinking steel protecting canister for drilled pile construction - Google Patents
Method for sinking steel protecting canister for drilled pile construction Download PDFInfo
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- CN101705684A CN101705684A CN200910212623A CN200910212623A CN101705684A CN 101705684 A CN101705684 A CN 101705684A CN 200910212623 A CN200910212623 A CN 200910212623A CN 200910212623 A CN200910212623 A CN 200910212623A CN 101705684 A CN101705684 A CN 101705684A
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- steel casing
- protecting canister
- sinking
- steel protecting
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Abstract
The invention discloses a method for sinking a steel protecting canister for drilled pile construction. By researching the friction resistance under special stratum conditions and in sunken states at the early stage, drilling holes on the circumferential line position of the steel protecting canister to be inserted and struck at certain intervals by using a high-pressure rotary jet drilling rig, and rotationally jetting bentonite slurry to form an annular slurry lubricating sleeve in the partial range of the sunken height of the protecting canister, the method improves the soil property of a special geological stratum, reduces the friction resistance when the super-long steel protecting canister is sunken, and achieves the aim of accurate sinking to the designed elevation. The method has the following advantages that: through geological pretreatment, the method can use the conventional tool and equipment for inserting and striking the large-diameter drilled pile steel protecting canister to implement the control for the sunken plane precision, verticality precision and elevation of the super large-diameter super-long steel protecting canister; the investment equipment are simple, safe and reliable, economic and practical, and strong in operability; and the method has reference function for the treatment for the steel protecting canister which cannot be sunken in place due to special reasons.
Description
Technical field
What the present invention relates to is a kind of method of drilled pile sinking steel protecting canister, is specially adapted to great diameter and long sinking steel protecting canister under the special geologic condition, belongs to the bridge substructure technical field of construction.
Background technology
Current, large diameter bored pile is widely used in the basis in large bridge water, and the trend of oriented super-large diameter, super long pile length direction development, makes the also increase thereupon of diameter, length, wall thickness and weight of its construction steel casing.Steel casing structure deadweight strengthens the elevating capacity of plugging in crane gear when beating, insert and set the ability that impulses fully and all corresponding raising of supporting capacity of operation platform.Present stage, the steel casing all adopts the merogenesis manufacturing, field joint, the method construction that gradation is sunk, but because major diameter steel casing field joint process is consuming time longer, if being subjected to bad climate to influence dead time will be longer, make a soil of Zhou Yuanyi liquefaction, after the stagnation of a few hours, will stablize again and more closely knit, particularly when the steel casing has buried dark or has passed through the pan soil geological stratification, to produce great frictional resistance around the steel casing, even employing import equipment, and two-shipper APE400B or the ICEV360 hydraulic vibration pile hammer of using in parallel, the power that impulses that reaches 6400KN also can't reach the sword pin, the sharp soil of stake can't liquefy, sinking steel protecting canister is very difficult, and work efficiency is extremely low.
At this moment, take to inhale in the steel casing processing methods such as mud, the follow-up of steel casing, all waters jetting at high pressure of stake usually, but often a kind of method is difficult to prove effective, often several method and with sinking steel protecting canister is put in place.But inhale the processing method of mud, the follow-up of steel casing in the steel casing, absolute altitude control requires tight, careless slightlyly may cause mouth founding at the bottom of the casing, the inhomogeneous downslide of all soil of stake; Simultaneously, all waters jetting at high pressure of stake also might make all soil of stake gap inhomogeneous, cause the run-off the straight under the soil lateral pressure of steel casing, and the plan-position and the verticality of steel casing exceed standard, and directly influence the pile quality of bored pile.In case this thing happens, it is longer to deal with the time cycle, and construction cost is very big, seriously influences the construction speed and the quality of engineering.
Summary of the invention
The present invention is directed to this great diameter and long sinking steel protecting canister difficulty, the not enough existing defective of conventional treatment measure, propose a kind of before sinking steel protecting canister, elder generation is at the subsidence position of steel casing, with the diameter circle contour of high-pressure rotary-spray rig along the steel casing, at a certain distance the special geology section is adopted the jet drill rig processing of holing, the lubricated slurry that ejects when utilizing the jet drill rig construction, improve the soil property on the local stratum of sinking scope, reduce the frictional resistance between steel casing and soil, make it sink down into design elevation smoothly.This method changes to construct to the steel casing in the past and the thinking of passive processing again occurs after the sinking difficulty, by the early stage to stake position special formation condition, the frictional resistance research under each state of sinking, insert in the part of sinking steel protecting canister position in advance and beat altitude range, by the high-pressure rotary-spray drilling machine construction, form the ring-shape mud lubricating sleeve, reduce pile perimeter resistance, simultaneously because the existence of ring-shape mud cover, soil layer reduces its horizontal applied force around in the sinking steel protecting canister, guiding device can be brought into play guide effect better, guarantee the verticality of steel casing, thereby guaranteed the precision and the programming of stake position.
Technical solution of the present invention, a kind of method of drilled pile sinking steel protecting canister is utilized and has been built the sinking steel protecting canister operation platform of finishing, measuring tapping casing tube wall circumference, single tube high-pressure rotary jet grouting pile construction drill is installed, along intending the slotting spacing boring that 50cm is pressed in steel casing tube wall circumference position of beating; Utilize the high-pressure pump churning mud on the high-pressure rotary-spray rig, drilling rod promotes while rotating with the speed of regulation simultaneously, high-pressure spray destroys the soil structures in the jetting height scope, bentonite slurry and mixing with soil, form the mud hole of an improvement, form a ring-shape mud cover after whole high-pressure rotary-spray pile driving constructions of whole steel casing tube wall circumference are finished; Determine process range according to place, stake position geological condition in the construction, or only handle at influencing the slotting special formation of beating of steel casing, after guaranteeing that sinking steel protecting canister is finished, stake week still can keep the stable of steel casing self, but the stake footpath height that the stake end absolute altitude of high-pressure rotary jet grouting pile at least should be higher 2 times than mouth absolute altitude at the bottom of the steel casing; To designing end absolute altitude, the steel casing leaves standstill a period of time with fluid pressure type vibropiling hammer sinking steel casing, makes all soil of stake have time enough to recover original proterties, in the hope of mud is reduced to bottom line to the influence of layer.
Described high-pressure rotary-spray rig adopts the expulsion pressure of 20～30MPa to spray bentonite slurry liquid or other sliding agents, covers whole jet drill rig construction height, estimates the radius of influence 20～25cm; During the pier pile foundation construction, maximum erosion line directly adopts bentonite slurry to spray with overlying strata in the water; When design considers that steel casing participation structure is stressed, can adopt the super slow-setting cement slurry as sliding agent;
Advantage of the present invention: by the geology preliminary treatment, available conventional large diameter drill hole pile steel casing is inserted the plant of beating, realize plane precision, verticality precision and the absolute altitude control of super-large diameter overlength sinking steel protecting canister, its used device is simple, safe and reliable, economic and practical, workable, and the steel casing processing that can't sink to putting in place because of cause specific is also had reference function.
The specific embodiment
By the early stage to researchs such as frictional resistances under super-large diameter, super long pile position special formation condition, each state that sinks, utilize the high-pressure rotary-spray rig along steel casing circumference in advance, part soil layer scope at the sinking steel protecting canister height, the lubricated slurry of churning, form the mud lubrication cover of a ring-type, improve the soil property of the local geological stratification of sinking scope, reduce the frictional resistance between steel casing and soil, make it sink down into design elevation smoothly, exactly.By the geology preliminary treatment of high-pressure rotary-spray rig, can adopt drilling platform, crane hoisting equipment, the hydraulic vibration pile driving equipment of normal large diameter borehole pile driving construction; The job practices that major diameter steel casing merogenesis manufacturing routinely, field joint, gradation are sunk is carried out super-large diameter in the special geologic condition, the construction of overlength sinking steel protecting canister.By the geology preliminary treatment of high-pressure rotary-spray rig, ring-shape mud cover of the local formation of sinking steel protecting canister scope, the horizontal force when making in the special soil layer reduces, and the guide effect of guiding device is better, the plane precision and the verticality precision height of stake position.Super-large diameter overlength sinking steel protecting canister construction is limited by no longer dead time, and the construction of high-pressure rotary-spray mud can carry out in advance, does not influence the steel casing and inserts and beat construction speed.Device therefor of the present invention is the high-pressure rotary-spray rig that conventional ground stabilization is used, and uses simple, safe and reliable, economic and practical, workable.Be not only applicable to the preliminary treatment of great diameter and long sinking steel protecting canister construction, simultaneously, for early stage geological conditions being underestimated, and can't sink down into the steel casing of design elevation, reference function is also arranged, promptly, reduce special geology layer soil property, make the steel casing sink to design elevation smoothly along the inside and outside wall churning mud of steel casing.
Claims (2)
1. the method for a drilled pile sinking steel protecting canister, it is characterized in that utilizing and built the sinking steel protecting canister operation platform of finishing, measuring tapping casing tube wall circumference is installed single tube high-pressure rotary jet grouting pile construction drill, along intending the slotting spacing boring that 50cm is pressed in steel casing tube wall circumference position of beating; Utilize the high-pressure pump churning mud on the high-pressure rotary-spray rig, drilling rod promotes while rotating with the speed of regulation simultaneously, high-pressure spray destroys the soil structures in the jetting height scope, bentonite slurry and mixing with soil, form the mud hole of an improvement, form a ring-shape mud cover after whole high-pressure rotary-spray pile driving constructions of whole steel casing tube wall circumference are finished; Determine process range according to place, stake position geological condition in the construction, or only handle at influencing the slotting special formation of beating of steel casing, after guaranteeing that sinking steel protecting canister is finished, stake week still can keep the stable of steel casing self, but the stake footpath height that the stake end absolute altitude of high-pressure rotary jet grouting pile at least should be higher 2 times than mouth absolute altitude at the bottom of the steel casing; To designing end absolute altitude, the steel casing leaves standstill a period of time with fluid pressure type vibropiling hammer sinking steel casing, makes all soil of stake have time enough to recover original proterties, in the hope of mud is reduced to bottom line to the influence of layer.
2. the method for a kind of drilled pile sinking steel protecting canister according to claim 1, it is characterized in that the high-pressure rotary-spray rig adopts the expulsion pressure of 20-30MPa to spray bentonite slurry liquid or other sliding agents, cover whole jet drill rig construction height, estimate radius of influence 20-25cm; During the pier pile foundation construction, maximum erosion line directly adopts bentonite slurry to spray with overlying strata in the water; When design considers that steel casing participation structure is stressed, can adopt the super slow-setting cement slurry as sliding agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910212623A CN101705684A (en) | 2009-11-13 | 2009-11-13 | Method for sinking steel protecting canister for drilled pile construction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910212623A CN101705684A (en) | 2009-11-13 | 2009-11-13 | Method for sinking steel protecting canister for drilled pile construction |
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| CN101705684A true CN101705684A (en) | 2010-05-12 |
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| CN200910212623A Pending CN101705684A (en) | 2009-11-13 | 2009-11-13 | Method for sinking steel protecting canister for drilled pile construction |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628269A (en) * | 2012-04-27 | 2012-08-08 | 河海大学 | Technical device for reducing negative frictional resistance on driven cast-in-place pile, and application method thereof |
| CN104453705A (en) * | 2014-11-14 | 2015-03-25 | 中铁二十一局集团第三工程有限公司 | Secondary forming method for large-hole-diameter cast-in-place pile rotary drilling rig |
| CN105697025A (en) * | 2016-03-29 | 2016-06-22 | 中铁隧道股份有限公司 | Escape device of bentonite improving shield tunneling machine and construction method thereof |
| CN106032669A (en) * | 2015-03-18 | 2016-10-19 | 重庆建工住宅建设有限公司 | Pile foundation casing embedding and pile pole drilling all-in-one machine |
| CN106149683A (en) * | 2015-04-23 | 2016-11-23 | 五冶集团上海有限公司 | A kind of cast-in-place pile construction method using double casing to pass through deep metalling |
| CN107460868A (en) * | 2016-06-02 | 2017-12-12 | 宜兴市周铁镇生力钻探机械厂 | A kind of prefabricated pile part soil compaction process for sinking |
| CN115387325A (en) * | 2022-06-08 | 2022-11-25 | 东通岩土科技股份有限公司 | Construction method for trapped cutting box body of pile machine in TRD (Top entry recovery rig) pulling construction method |
| CN116951171A (en) * | 2023-05-26 | 2023-10-27 | 中国水电基础局有限公司 | Distributed pipeline system |
-
2009
- 2009-11-13 CN CN200910212623A patent/CN101705684A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628269A (en) * | 2012-04-27 | 2012-08-08 | 河海大学 | Technical device for reducing negative frictional resistance on driven cast-in-place pile, and application method thereof |
| CN102628269B (en) * | 2012-04-27 | 2014-05-07 | 河海大学 | Technical device for reducing negative frictional resistance on driven cast-in-place pile, and application method thereof |
| CN104453705A (en) * | 2014-11-14 | 2015-03-25 | 中铁二十一局集团第三工程有限公司 | Secondary forming method for large-hole-diameter cast-in-place pile rotary drilling rig |
| CN104453705B (en) * | 2014-11-14 | 2017-01-25 | 中铁二十一局集团第三工程有限公司 | Secondary forming method for large-hole-diameter cast-in-place pile rotary drilling rig |
| CN106032669A (en) * | 2015-03-18 | 2016-10-19 | 重庆建工住宅建设有限公司 | Pile foundation casing embedding and pile pole drilling all-in-one machine |
| CN106032669B (en) * | 2015-03-18 | 2018-06-29 | 重庆建工住宅建设有限公司 | A kind of pile foundation shield-tube embedment creeps into all-in-one machine with stake holes |
| CN106149683A (en) * | 2015-04-23 | 2016-11-23 | 五冶集团上海有限公司 | A kind of cast-in-place pile construction method using double casing to pass through deep metalling |
| CN105697025A (en) * | 2016-03-29 | 2016-06-22 | 中铁隧道股份有限公司 | Escape device of bentonite improving shield tunneling machine and construction method thereof |
| CN107460868A (en) * | 2016-06-02 | 2017-12-12 | 宜兴市周铁镇生力钻探机械厂 | A kind of prefabricated pile part soil compaction process for sinking |
| CN115387325A (en) * | 2022-06-08 | 2022-11-25 | 东通岩土科技股份有限公司 | Construction method for trapped cutting box body of pile machine in TRD (Top entry recovery rig) pulling construction method |
| CN115387325B (en) * | 2022-06-08 | 2024-01-30 | 东通岩土科技股份有限公司 | Construction method for trapped cutting box body of pile machine in TRD construction method |
| CN116951171A (en) * | 2023-05-26 | 2023-10-27 | 中国水电基础局有限公司 | Distributed pipeline system |
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Open date: 20100512 |