CN108914925A - Prefabricated pile high-pressure injection base expanding and base expanding post-grouting technology - Google Patents
Prefabricated pile high-pressure injection base expanding and base expanding post-grouting technology Download PDFInfo
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- CN108914925A CN108914925A CN201810802431.8A CN201810802431A CN108914925A CN 108914925 A CN108914925 A CN 108914925A CN 201810802431 A CN201810802431 A CN 201810802431A CN 108914925 A CN108914925 A CN 108914925A
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- base expanding
- prefabricated
- pile
- pressure
- prefabricated pile
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Classifications
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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
- E02D5/24—Prefabricated piles
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
It invents " prefabricated pile high-pressure injection base expanding and base expanding post-grouting technology " and is suitable for foundation and underground space field of engineering technology, background technique is at present for prefabricated pile, how after prefabricated pile reaches supporting course, reaming is carried out at stake end and forms enlarged footing, it is still a problem to be solved to which the ultimate bearing capacity of stake be greatly improved.The present invention can solve prefabricated pile and sink to reaming problem after supporting course in stake end bottom, the prefabricated pile for being reserved with vertical through-via (pipeline) among Grouting Pipe and pile body to the effect that will be first embedded with to make, after above-mentioned prefabricated prefabricated pile is sunk to supporting course according to design requirement by building-site, high-pressure injection pipe is put into an end bottom using high compression injection techniques progress base expanding and base expanding by being reserved in the hollow hole (pipeline) among pile body, after reaching design requirement, end pressure grouting is carried out again or high-pressure slip-casting forms the construction of prefabricated piles scheme and method of stake end enlarged footing.
Description
Technical field：
Foundation and underground space engineering technology
Background technique：
At present in ground foundation engineering field, bored concrete pile is expanded by manually digging hole or drilling machine in bottom hole in the pore-forming stage
Hole forms the contact area that stake end enlarged footing increases stake bottom and supporting course, has improved the technology of the single pile bearing capacity of bored concrete pile
Through commonplace, but for prefabricated pile, how after prefabricated pile reaches supporting course, reaming is carried out at stake end, and formed at stake end
Enlarged footing is still a problem to be solved so that the ultimate bearing capacity of stake be greatly improved.
Summary of the invention：
" prefabricated pile high-pressure injection base expanding and base expanding post-grouting technology " of the invention is a kind of about the improvement of prefabricated pile application technology method
New technical solution and method afterwards can solve prefabricated pile and reach the stake end reaming problem after supporting course, and can be in prefabricated pile
Stake end forms enlarged footing, to increase substantially the ultimate bearing capacity of single pile of prefabricated pile.To the effect that, prefabricated by being reserved in
The interstitial hole (pipeline) of stake body carries out reaming using high compression injection techniques at the stake end of prefabricated pile, then recycles post jacking
Technology carries out slip casing by pressure to stake end, ultimately forms an end enlarged footing.New construction of prefabricated piles scheme and method can make prefabricated
The ultimate bearing capacity of single pile of stake significantly improves, and pile foundation engineering cost significantly reduces.
Specific embodiment：
1, this is a kind of new simple construction of prefabricated piles technical solution and method, i.e., first according to engineering design requirements,
Pre-fabricated factory or building-site will be embedded with the prefabricated pile production that vertical through-via (pipeline) is reserved among Grouting Pipe and pile body
Good, the diameter of pile body interstitial hole (pipeline), which will meet, can make high-pressure injection pipe enter a requirement for end bottom construction operation, together
When meet the requirement of bottom hole borehole cleaning when excluding mud and the reaming of stake end during construction of prefabricated piles.The spies such as the outer shape of prefabricated pile
Sign, makes according to engineering design requirements.Interstitial hole (pipeline) bottom for being reserved in prefabricated stake body should be soluble solid using filling
The safeguard measures such as body salt are convenient for high pressure jet stream unclog the pipe, such as difficult available engineering driller drilling dredging.
2, building-site by drilling guiding or static pressure or squeezes into above-mentioned prefabricated prefabricated pile according to design requirement
Method enters prefabricated pile stake end after supporting course reaches projected depth, passes through the preformed hole being reserved among pile body up and down
High-pressure injection pipe is put into an end bottom by (pipeline), carries out reaming, high pressure clear water stream or empty with compression using high compression injection techniques
The mixed flow of gas cuts stake end bottom using the powerful cutting power of high pressure fine injection stream or whirl spraying or swaying-jet-grouting or vectored injection
The stratum of surrounding expands a underfill aperture, after bellout diameter reaches design requirement, high-pressure nozzle is withdrawn from, bellout diameter can
It is detected with advanced instrument, borehole cleaning is carried out to pile bottom sediment using the through hole among pile body, it is therefore an objective to reduce the sediment at bottom
It is reduced with the clay content in stake bottom slurry, after borehole cleaning index reaches design requirement, passes through Grouting Pipe or stake pre-buried in prefabricated pile
Body interstitial hole (pipeline) carries out pressure grouting to stake end bottom or high-pressure slip-casting, slurries can be cement slurry or cement mortar, starches
It can be final the result is that the slurry of injection stake end bottom added with the other materials conducive to grout cures strength and stability in liquid
Liquid has carried out compacted and densification to the stratum around stake end and has formed an enlarged footing in prefabricated pile end bottom, thus significantly
Improve the ultimate bearing capacity of single pile of prefabricated pile.
3, this new departure new method is generally adapted to cohesive soil, sandy soil and rubble class soil layer, for basement rock weathered layer
With high compression injection techniques, mud jacking is also beneficial to pressure permeation of the slurries into Rock fractures again after the hole flushing of stake bottom, also can
An integrality for end decayed rock and intensity are improved, finally improves the bearing capacity of pile tip of prefabricated pile.
Claims (3)
1. invention " prefabricated pile high-pressure injection base expanding and base expanding post-grouting technology " be a kind of new simple construction of prefabricated piles technical solution and
Method refers to during construction of prefabricated piles, first according to engineering design requirements, will be embedded with note in pre-fabricated factory or building-site
The prefabricated pile that vertical through-via (pipeline) is reserved among slurry pipe and pile body is made, when building-site will be upper according to design requirement
It states after prefabricated prefabricated pile sinks to supporting course and reach projected depth, by being reserved among pile body up and down reserved
High-pressure injection pipe is put into an end bottom and carries out base expanding and base expanding using high compression injection techniques by hole (pipeline), after reaching design requirement, then into
The grouting of row stake end pressure or high-pressure slip-casting form the construction of prefabricated piles scheme and method of stake end enlarged footing.
2. invention " prefabricated pile high-pressure injection base expanding and base expanding post-grouting technology ", wherein passing through the centre being reserved among pile body up and down
High-pressure injection pipe is put into after an end bottom carries out base expanding and base expanding and base expanding and base expanding using high compression injection techniques and carries out stake end pressure by hole (pipeline)
Grouting or high-pressure slip-casting form two features that stake end enlarged footing is this invention.
3. invention " prefabricated pile high-pressure injection base expanding and base expanding post-grouting technology " refers to by being reserved among pile body as described in above-mentioned 2, money
High-pressure injection pipe is put into an end bottom and carries out base expanding and base expanding using high compression injection techniques by interstitial hole (pipeline) up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810802431.8A CN108914925A (en) | 2018-07-20 | 2018-07-20 | Prefabricated pile high-pressure injection base expanding and base expanding post-grouting technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810802431.8A CN108914925A (en) | 2018-07-20 | 2018-07-20 | Prefabricated pile high-pressure injection base expanding and base expanding post-grouting technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108914925A true CN108914925A (en) | 2018-11-30 |
Family
ID=64416658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810802431.8A Pending CN108914925A (en) | 2018-07-20 | 2018-07-20 | Prefabricated pile high-pressure injection base expanding and base expanding post-grouting technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108914925A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1298990A (en) * | 2000-12-20 | 2001-06-13 | 罗明 | High-pressure rotary spray technique for enlarging base of preburied pipe |
| CN1614156A (en) * | 2004-12-06 | 2005-05-11 | 雷玉华 | Construction method for making hollow pile with large end at bottom by casting concrete in situ |
| CN201520973U (en) * | 2009-10-20 | 2010-07-07 | 上海强劲基础工程有限公司 | Precast pile with grouting hole |
-
2018
- 2018-07-20 CN CN201810802431.8A patent/CN108914925A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1298990A (en) * | 2000-12-20 | 2001-06-13 | 罗明 | High-pressure rotary spray technique for enlarging base of preburied pipe |
| CN1614156A (en) * | 2004-12-06 | 2005-05-11 | 雷玉华 | Construction method for making hollow pile with large end at bottom by casting concrete in situ |
| CN201520973U (en) * | 2009-10-20 | 2010-07-07 | 上海强劲基础工程有限公司 | Precast pile with grouting hole |
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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 | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 102600 Beijing Daxing District Kangzhuang Road No. 9 Central Railway Fifth Courtyard District B Building 703 Applicant after: Gao Yongguang Applicant after: Gao Yunfei Address before: 100012 Huayu City, Tiejian, China 9-1-302, Shuiban South Street, Chaoyang District, Beijing Applicant before: Gao Yongguang Applicant before: Gao Yunfei |
|
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20181130 |