CN106939620A - Drive precast piles floating treatment method on the whole - Google Patents
Drive precast piles floating treatment method on the whole Download PDFInfo
- Publication number
- CN106939620A CN106939620A CN201610001447.XA CN201610001447A CN106939620A CN 106939620 A CN106939620 A CN 106939620A CN 201610001447 A CN201610001447 A CN 201610001447A CN 106939620 A CN106939620 A CN 106939620A
- Authority
- CN
- China
- Prior art keywords
- pile
- strike
- prefabricated pile
- prefabricated
- construction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/10—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure
- E02D31/12—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure against upward hydraulic pressure
Abstract
Prefabricated pile has completed, without piling work in piling, periphery 60m, to determine that prefabricated pile floats by daily construction monitoring and stablized, it is characterised in that comprise the following steps comprehensively in a kind of drive precast piles floating treatment method on the whole, region：A sets drainage by well points, b selection construction machineries, c strike-on construction of prefabricated piles sequence arrangements, the prefabricated pile monitoring after the operation of d strike-ons prefabricated pile and e strike-ons.Floating treatment method has quickly and effectively completion prefabricated pile pile foundation strike-on to the drive precast piles of the present invention on the whole, can be while pile foundation resets in time, it ensure that the bearing capacity of engineering pile and ensure the construction quality of foundation, reduction prefabricated pile, which integrally floats, handles the advantage of engineering cost.
Description
Technical field
It is a kind of drive precast piles floating treatment method on the whole specifically the present invention relates to a kind of processing method of engineering pile in pile foundation engineering.
Background technology
During pile foundation engineering construction of prefabricated piles, because the soil-squeezing action of prefabricated pile body often makes pile body by upward pulling force, the stake first constructed is caused to be floated, especially when pilespacing is closeer and soil around pile clay layer is thicker, this phenomenon is more serious.The performance such as pile bearing capacity is all by large effect after stake floating.
Chinese patent CN102182179
B disclosed a kind of method of floating stake reinforcement on 2 13rd, 2013, wherein to needing the pile crown of reinforcement to properly protect measure：A pile crown protection system is made at the top of pile crown；Free-falling hammer equipment is installed at the scene：Herringbone dead man is placed in pile crown both sides, fixed using cable wind rope；Weight is suspended on the suspension hook below assembly pulley, weight is hung to certain height using hoist engine and assembly pulley；Strike-on is carried out to pile crown using free-falling hammer mode；High stress drive monitoring instrument equipment is set to be monitored at the scene simultaneously.Although the method that the invention is monitored using free-falling hammer strike-on and high stress drive means can handle the floating stake occurred in engineering, but the free-falling hammer of this method belongs to passive control, the monitoring of high stress drive means, analysis are complicated, cause that pile crown strike-on is slow in one's movements, efficiency of construction is poor.Pile foundation strike-on can not be quickly and effectively completed at all in the case that level of ground water is enriched especially in floating stake affiliated area, and Pile Foundations Design absolute altitude differs in region.
Therefore known floating stake processing method there are problems that above-mentioned a variety of inconvenience and.
The content of the invention
The purpose of the present invention, is to propose a kind of drive precast piles for quickly and effectively completing prefabricated pile pile foundation strike-on floating treatment method on the whole.
To achieve the above object, technical solution of the invention is：
Prefabricated pile has completed, without piling work in piling, periphery 60m, to determine that prefabricated pile floats by daily construction monitoring and stablized, it is characterised in that comprise the following steps comprehensively in a kind of drive precast piles floating treatment method on the whole, region：
A, setting drainage by well points
To prevent hole a large amount of ponding in bottom, soaked after excavating, strike-on prefabricated pile should shift to an earlier date before excavating uses tube well dewatering on construction area periphery, intending excavating region surrounding 30 mouthfuls of diameter 450mm pipe wells of arrangement, well casing is managed using diameter 250mmPVC, and filter material is filled out entirely between pvc pipe and wellhole；
B, selection construction machinery
According to geology prospecting report and early stage condition of construction, strike-on reset is carried out to prefabricated pile using crawler type piling machine, to diameter 400mm-600mm prefabricated pile, hammered into shape from 6.2t-10t tubular diesels；
C, strike-on construction of prefabricated piles sequence arrangement
For the inconsistent prefabricated pile of stake top absolute altitude, by absolute altitude by strike-on area dividing, layering is cut the earth, and is layered strike-on prefabricated pile；Strike-on prefabricated pile follows four sides behind first centre, it is first close after thin basic principle, first strike-on absolute altitude compared with lower part prefabricated pile, then strike-on absolute altitude deeper portion prefabricated pile；
D, the operation of strike-on prefabricated pile
（1）Prepare：The soil or water section in prefabricated pile tube core are removed before strike-on prefabricated pile, depth is removed and is not less than 100cm；Gap during strike-on around pile cover and prefabricated pile should be controlled between 5~10mm, and cushion pad is placed between tubular diesel hammer and pile cover, pile cover and prefabricated pile, and cushion pad will have enough elasticity；Tubular diesel hammer, pile cover and prefabricated pile pile body should be on same center lines；
（2）Activation：Start first to use cold-hammer during strike-on（Neutral）Strike-on prefabricated pile, to adjust straight degree and to activate prefabricated pile pile body；
（3）Reset：Put in the first speed reset injection prefabricated pile after the activation of prefabricated pile pile body, while noting piling machine Throttle Opening Control, control hammer force is in 650t~700t；In Pile feeder subscript high scale, with spirit level tracking observation prefabricated pile deflection；
（4）Pile follower：Hammer is received after being hit after prefabricated pile, which sinks, to be resetted without substantially sinking, or pile penetration less than 3cm/10；
Prefabricated pile monitoring after e, strike-on
（1）Record is performed to the high repetition measurement of prefabricated pile top mark immediately after strike-on；Survey a prefabricated pile stake top absolute altitude after strike-on prefabricated pile in 7 days daily, survey once within every 2 days after 7 days, until pouring sole plate concrete；
（2）After the completion of excavation of foundation pit, low strain dynamic monitoring is carried out to prefabricated pile 100%.
Floating treatment method can also be further achieved by the following technical measures the drive precast piles of the present invention on the whole.
Foregoing method, wherein the strike-on prefabricated pile is excavated, is excavated again after water level is down to below -8.2m.
Foregoing method, wherein the crawler type piling machine need to arrange two, every daily 9~10 prefabricated piles of strike-on.
Foregoing method, wherein the thickness after cushion pad compacting is not less than 120mm.
After adopting the above technical scheme, floating treatment method has advantages below to the drive precast piles of the present invention on the whole：
1st, prefabricated pile pile foundation strike-on is quickly and effectively completed；
2nd, can be while pile foundation resets in time, it is ensured that the bearing capacity of engineering pile；
3rd, the construction quality of foundation is ensured, reduction prefabricated pile integrally floats processing engineering cost.
Embodiment
The present invention is further illustrated below by way of specific embodiment.
Embodiment 1
Zhanjiang steel dry coke quenching project, designs 466 sets of engineering pile, the wherein a height of -7.0m of coke dry quenching body foundation pile top mark, the dedusting of both sides first and second basis and a height of -1.4~-1.9m of pipe support foundation pile top mark, vestibule and a height of -4.4m of elevator foundation pile top mark altogether.During piling, by being monitored to the absolute altitude for having completed pile foundation, it is found that dry coke quenching engineering pile has different degrees of floating, maximum float-amount reaches 144mm.
In view of this situation, strike-on processing need to be carried out to floating engineering pile.Report is surveyed according to dry coke quenching region, -7.0m is in level of ground water in argillic horizon, affiliated area and enriched, and Pile Foundations Design absolute altitude differs in region, and very big difficulty is caused to pile foundation strike-on.
Use the drive precast piles floating treatment method on the whole of the present invention, prefabricated pile completes piling comprehensively in region, without piling work in the 60m of periphery, determines that prefabricated pile floats by daily construction monitoring and stablized, the drive precast piles processing concrete measure that integrally floats comprises the following steps：
A, setting drainage by well points
This engineering geological condition, in Zhanjiang group medium-sand seam containing cohesive soil, water is relatively enriched, and exploration conclusion shows that fixed level buried depth is 0.40 m~2.10m, and artesian water depth to water is about 4.5m.At a time when rainy season, to prevent the hole a large amount of ponding in bottom after excavating, soaked, tube well dewatering is used on construction area periphery, 30 mouthfuls of 450mm pipe wells are arranged intending excavating region surrounding, well casing fills out filter material entirely using 250mmPVC pipes between pvc pipe and wellhole.Strike-on should shift to an earlier date precipitation before excavating, and be excavated again after water level is down to below -8.2m.
B, selection construction machinery
Report and early stage construction experience are surveyed in base area, and strike-on reset, the stake to diameter 600mm are carried out to engineering pile using crawler type piling machine, from 10t tubular diesels hammer, the stake to diameter 500mm is hammered into shape from 8t tubular diesels, stake to diameter 400mm, is hammered into shape from 6.2t tubular diesels.
C, strike-on construction of prefabricated piles sequence arrangement
Because stake top absolute altitude is inconsistent, therefore by absolute altitude by strike-on area dividing, layering is cut the earth, and is layered strike-on.Strike-on follows four sides behind first centre, first close rear thin basic principle, and first strike-on absolute altitude is compared with lower part, then strike-on absolute altitude deeper portion.
In view of strike-on amount and overall construction period, two crawler type piling machines, every daily 9~10 engineering piles of strike-on are arranged.
D, the operation of strike-on prefabricated pile
（1）Prepare：The soil or water section in prefabricated pile tube core are removed before strike-on prefabricated pile, depth is removed and is not less than 100cm；Gap during strike-on around pile cover and prefabricated pile should be controlled between 5~10mm, and cushion pad is placed between tubular diesel hammer and pile cover, pile cover and prefabricated pile, and cushion pad will have enough elasticity；Tubular diesel hammer, pile cover and prefabricated pile pile body should be on same center lines.
（2）Activation：Start first to use cold-hammer during strike-on（Neutral）Strike-on prefabricated pile, to adjust straight degree and to activate prefabricated pile pile body.
（3）Reset：Put in the first speed reset injection prefabricated pile after the activation of prefabricated pile pile body, while noting piling machine Throttle Opening Control, control hammer force is in 650t~700t；In Pile feeder subscript high scale, with spirit level tracking observation prefabricated pile deflection.Piling should select veteran operating personnel to operate.
（4）Pile follower：Hammer is received after being hit after prefabricated pile, which sinks, to be resetted without substantially sinking, or pile penetration less than 3cm/10.
Prefabricated pile monitoring after e, strike-on
（1）Record is performed to the high repetition measurement of prefabricated pile top mark immediately after strike-on；Survey a prefabricated pile stake top absolute altitude after strike-on prefabricated pile in 7 days daily, survey once within every 2 days after 7 days, until pouring sole plate concrete.
（2）After the completion of excavation of foundation pit, low strain dynamic monitoring is carried out to prefabricated pile 100%.
The present invention has substantive distinguishing features and a significant technological progress, drive precast piles of the invention floating treatment method on the whole, quickly and effectively completes pile foundation strike-on, while summing up a set of effective pile foundation strike-on construction technology, thinks that similar engineering is used for reference.
The drive precast piles of the present invention on the whole use and promote in enterprising exercise of the project coking of Baosteel Zhanjiang iron and steel base and the construction of jet engineering by floating treatment method, and all engineering piles are timely and effectively able to strike-on in place, work well.Low strain vibration test result is good after foundation ditch is completely excavated, and is that dry coke quenching civil engineering construction creates favourable condition.
Above example is used for illustrative purposes only, rather than limitation of the present invention, person skilled in the relevant technique, without departing from the spirit and scope of the present invention, can also make various conversion or change.Therefore, all equivalent technical schemes should also belong to scope of the invention, should be limited by each claim.
Claims (4)
1. prefabricated pile has completed, without piling work in piling, periphery 60m, to determine that prefabricated pile floats by daily construction monitoring and stablized, it is characterised in that comprise the following steps comprehensively in a kind of drive precast piles floating treatment method on the whole, region：
A, setting drainage by well points
To prevent hole a large amount of ponding in bottom, soaked after excavating, strike-on prefabricated pile should shift to an earlier date before excavating uses tube well dewatering on construction area periphery, intending excavating region surrounding 30 mouthfuls of diameter 450mm pipe wells of arrangement, well casing is managed using diameter 250mmPVC, and filter material is filled out entirely between pvc pipe and wellhole；
B, selection construction machinery
According to geology prospecting report and early stage condition of construction, strike-on reset is carried out to prefabricated pile using crawler type piling machine, to diameter 400mm-600mm prefabricated pile, hammered into shape from 6.2t-10t tubular diesels；
C, strike-on construction of prefabricated piles sequence arrangement
For the inconsistent prefabricated pile of stake top absolute altitude, by absolute altitude by strike-on area dividing, layering is cut the earth, and is layered strike-on prefabricated pile；Strike-on prefabricated pile follows four sides behind first centre, it is first close after thin basic principle, first strike-on absolute altitude compared with lower part prefabricated pile, then strike-on absolute altitude deeper portion prefabricated pile；
D, the operation of strike-on prefabricated pile
（1）Prepare：The soil or water section in prefabricated pile tube core are removed before strike-on prefabricated pile, depth is removed and is not less than 100cm；Gap during strike-on around pile cover and prefabricated pile should be controlled between 5~10mm, and cushion pad is placed between tubular diesel hammer and pile cover, pile cover and prefabricated pile, and cushion pad will have enough elasticity；Tubular diesel hammer, pile cover and prefabricated pile pile body should be on same center lines；
（2）Activation：Start first to use cold-hammer during strike-on（Neutral）Strike-on prefabricated pile, to adjust straight degree and to activate prefabricated pile pile body；
（3）Reset：Put in the first speed reset injection prefabricated pile after the activation of prefabricated pile pile body, while noting piling machine Throttle Opening Control, control hammer force is in 650t~700t；In Pile feeder subscript high scale, with spirit level tracking observation prefabricated pile deflection；
（4）Pile follower：Hammer is received after being hit after prefabricated pile, which sinks, to be resetted without substantially sinking, or pile penetration less than 3cm/10；
Prefabricated pile monitoring after e, strike-on
（1）Record is performed to the high repetition measurement of prefabricated pile top mark immediately after strike-on；Survey a prefabricated pile stake top absolute altitude after strike-on prefabricated pile in 7 days daily, survey once within every 2 days after 7 days, until pouring sole plate concrete；
（2）After the completion of excavation of foundation pit, low strain dynamic monitoring is carried out to prefabricated pile 100%.
2. drive precast piles as claimed in claim 1 floating treatment method on the whole, it is characterised in that the strike-on prefabricated pile is excavated, and is excavated again after water level is down to below -8.2m.
3. drive precast piles as claimed in claim 1 floating treatment method on the whole, it is characterised in that the crawler type piling machine need to arrange two, every daily 9~10 prefabricated piles of strike-on.
4. drive precast piles as claimed in claim 1 floating treatment method on the whole, it is characterised in that the thickness after the cushion pad compacting is not less than 120mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610001447.XA CN106939620A (en) | 2016-01-05 | 2016-01-05 | Drive precast piles floating treatment method on the whole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610001447.XA CN106939620A (en) | 2016-01-05 | 2016-01-05 | Drive precast piles floating treatment method on the whole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106939620A true CN106939620A (en) | 2017-07-11 |
Family
ID=59468875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610001447.XA Pending CN106939620A (en) | 2016-01-05 | 2016-01-05 | Drive precast piles floating treatment method on the whole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106939620A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182179A (en) * | 2011-03-07 | 2011-09-14 | 福建省建筑科学研究院 | Floating pile reinforcing method |
| WO2012034559A1 (en) * | 2010-09-15 | 2012-03-22 | Ottosen G O | System for redusing the magnus effect on vertical, floating, rotating, bottom anchored offshore piles/poles. |
| CN103290846A (en) * | 2013-06-07 | 2013-09-11 | 陈春来 | Construction method for preventing static-pressure precast tubular piles from floating |
| CN204199335U (en) * | 2014-09-29 | 2015-03-11 | 中国建筑第八工程局有限公司 | A kind of pressure release well reducing PHC tube pile construction soil compaction effect |
-
2016
- 2016-01-05 CN CN201610001447.XA patent/CN106939620A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012034559A1 (en) * | 2010-09-15 | 2012-03-22 | Ottosen G O | System for redusing the magnus effect on vertical, floating, rotating, bottom anchored offshore piles/poles. |
| CN102182179A (en) * | 2011-03-07 | 2011-09-14 | 福建省建筑科学研究院 | Floating pile reinforcing method |
| CN103290846A (en) * | 2013-06-07 | 2013-09-11 | 陈春来 | Construction method for preventing static-pressure precast tubular piles from floating |
| CN204199335U (en) * | 2014-09-29 | 2015-03-11 | 中国建筑第八工程局有限公司 | A kind of pressure release well reducing PHC tube pile construction soil compaction effect |
Non-Patent Citations (2)
| Title |
|---|
| 厉见芬等: "某高层大厦主楼群桩上浮原因剖析及处理对策", 《常州工学院学报》 * |
| 郭志: "某工程 PHC管桩上浮处理措施", 《中小企业管理与科技》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102888834B (en) | A kind of construction method of major diameter broken stone pile | |
| CN110344400A (en) | The hard rock pore-forming construction technology of churning driven opportunity | |
| CN104612179B (en) | Through the construction method of the diaphram wall of super thick silty sand ground | |
| CN110387896A (en) | Base pit dewatering well design method | |
| CN109281330A (en) | A kind of osmotic control method | |
| CN105735232A (en) | Collapsible loess wellpoint presoaking dynamic compaction replacement method | |
| CN105133569A (en) | Method for processing saturated land foundation through excitation drainage consolidation | |
| CN105113478A (en) | Dynamic compaction treatment method of deep foundation displacement | |
| CN105200973A (en) | Comprehensive treatment method of soft foundation | |
| CN210315632U (en) | Annular underground diaphragm wall foundation of large-span arch bridge in deep coverage area | |
| CN104652411B (en) | Composite foundation treatment method based on reinforcement, pretreatment and dynamic compaction of sandy soil | |
| CN113846618A (en) | Dynamic compaction replacement reinforcing method for foundation treatment | |
| CN106049413B (en) | A kind of composite power drain consolidation system and construction method applied to deep layer foundation in saturated soft soil | |
| CN210530860U (en) | Deep-buried blocking barrier for controlling deformation of tunnel outside foundation pit | |
| CN102787608B (en) | Gravity type foundation pit supporting system under vacuum effect and construction method | |
| CN104674782A (en) | Foundation processing method based on sand well dynamic compaction composition of muddy soft soil | |
| CN207211176U (en) | A kind of big open caisson of superelevation | |
| CN206667225U (en) | A kind of novel solid drainage system of reinforcing soft ground | |
| CN108570979A (en) | A kind of construction method for building antiseepage composite foundation on dolomite stratigraph | |
| CN107012792B (en) | A kind of construction method of bridge substructure | |
| CN115288162A (en) | Reinforcing method for soft soil foundation fill slope | |
| CN106939620A (en) | Drive precast piles floating treatment method on the whole | |
| Moh et al. | Preconsolidation of soft Bangkok clay by non-displacement sand drains and surcharge | |
| CN203846479U (en) | Saturated loose sand compacting system | |
| CN211472562U (en) | Large-scale hypervelocity centrifuge basis suitable for soft foundation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170711 |
|
| RJ01 | Rejection of invention patent application after publication |