CN109930593A - A kind of Structural Engineering stake and construction method and its application in middle hard place matter soil layer - Google Patents
A kind of Structural Engineering stake and construction method and its application in middle hard place matter soil layer Download PDFInfo
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- CN109930593A CN109930593A CN201910229708.7A CN201910229708A CN109930593A CN 109930593 A CN109930593 A CN 109930593A CN 201910229708 A CN201910229708 A CN 201910229708A CN 109930593 A CN109930593 A CN 109930593A
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Abstract
The present invention relates to a kind of Structural Engineering stake and construction method and its application in middle hard place matter soil layer, the composite pile that the Structural Engineering stake is collectively formed by high-pressure rotary jet grouting pile and prefabricated tubular pile；The compound pile construction method is first with triple-pipe high pressure jet grouting stake machine in middle hard place matter soil layer construction high-pressure rotary jet grouting pile, the cement consumption of strict control rotary churning pile, cement consumption is no less than the 15% of whirl spraying quality of pile, after the completion of rotary churning pile pile, interval 1 ~ 3 hour, prefabricated tubular pile is pressed into high-pressure rotary jet grouting pile with static pressure machine before cement does not solidify, prefabricated tubular pile stake is long identical with Pile of High-pressure Spiral Jet length, forms the cores composite piles such as high-pressure rotary-spray+prefabricated tubular pile.The present invention solves the problems, such as that prefabricated tubular pile should not be used in middle hard place matter soil layer, while having promoted the application range of composite pile significantly, is no longer limited to the use of Soft Soil Ground And Foundation reinforcing, while can be used for high-rise and Super High house pile foundation.
Description
Technical field
The present invention relates to foundation fields in civil engineering, are specifically for use in high-rise or Super High house engineering pile.
Background technique
Composite pile is a kind of novel pile-type developed on the basis of cement mixing method, be cement earth pile at
After stake, then sink to prefabricated concrete core pile, form a kind of concrete core and soil cement work together, common bearing load.Coagulation
The advantages of core column generallys use precast prestressed concrete pipe stake, and concrete-cored cement earth pile is provided simultaneously with cement earth pile and tubular pole,
With compared with high-bearing capacity, can effective control settlement, be a kind of ideal soft clay area ground base enforcement method.It is compound
Since the 1990s is applied for the first time at home, many scholars research and analyse it for stake, find concrete core+water
For soil stake working method close to friction pile, stake end only undertakes 7% or so total load head, and cement earth pile and soil around pile interface
Limit in mean frictional resistance is much higher than general cement mixing method.
Country's composite pile is largely to add prefabricated tubular pile using cement mixing method at present, is relatively specific for soft clay area
Ground base enforcement, and bearing capacity is lower, is not suitable for high-rise or Super High house pile foundation, in middle hard place matter soil layer
Area, cement mixing method are difficult pile, and simple prefabricated tubular pile is also difficult to be implanted into, and design pile-type at present and mainly select drill-pouring
Stake, higher cost.And high-pressure rotary jet grouting pile can in middle hard place matter soil layer pile, and pile stake is long is greatly improved, thus
It can be implanted into prefabricated tubular pile, form the composite pile of common stress, by adjusting rotary churning pile diameter and prefabricated tubular pile diameter, can be made
Compound pile bearing capacity is greatly improved, and meets requirement of the high-rise or super high-rise building to bearing capacity of pile.
Summary of the invention
Place in order to overcome the above-mentioned deficiencies of the prior art, the present invention provide a kind of Structural Engineering stake and construction method and its
Application in middle hard place matter soil layer, resulting structures engineering pile structural principle is simple, easy for construction, it can effectively solve commonly
Composite pile is not suitable for the problem of middle hard place matter soil layer, while by adjusting high-pressure rotary jet grouting pile and prefabricated tubular pile diameter, can make
The bearing capacity of this kind of composite pile is greatly improved, and meets requirement of the skyscraper to bearing capacity of pile.
To achieve the above object, the present invention adopts the following technical scheme: a kind of construction method of Structural Engineering stake, the knot
The composite pile that structure engineering pile is collectively formed by high-pressure rotary jet grouting pile and prefabricated tubular pile；The compound pile construction method is first high with triple tube
Pressure rotary-spraying stake machine is in middle hard place matter soil layer construction high-pressure rotary jet grouting pile, and the cement consumption of strict control rotary churning pile, cement consumption is not
Less than the 15% of whirl spraying quality of pile, after the completion of rotary churning pile pile, it is spaced 1 ~ 3 hour, it will be pre- with static pressure machine before cement does not solidify
Tubulation stake is pressed into high-pressure rotary jet grouting pile, and prefabricated tubular pile stake is long identical with Pile of High-pressure Spiral Jet length, forms high-pressure rotary-spray+prefabricated tubular pile
Equal cores composite pile.
Clay in middle hard place matter soil layer of the present invention be it is plastic arrive hard plastic state, sand be in low close state, rock stratum
For strongly weathered sand-rock.
The present invention also provides the equal cores composite piles by high-pressure rotary-spray+prefabricated tubular pile obtained by the above method.
The cores composite piles such as the high-pressure rotary-spray+prefabricated tubular pile are built as Structural Engineering stake in the room of middle hard place matter soil layer
Application in engineering.
Uplift pile of the equal cores composite pile as high-rise or Super High house pressure bearing pile or basement.
Structure of the invention engineering pile structural principle is simple, easy for construction, be from the cement mixing method of current technology maturation+
The composite pile of prefabricated tubular pile extends, it can effectively solve that composite pile is not suitable for the problem of middle hard place matter soil layer, simultaneously
By adjusting high-pressure rotary jet grouting pile and prefabricated tubular pile diameter, the compound pile bearing capacity of high-pressure rotary-spray+prefabricated tubular pile can be made to obtain very
Big promotion meets requirement of the skyscraper to bearing capacity of pile.
The present invention solves the problems, such as that prefabricated tubular pile should not be used in middle hard place matter soil layer, while having promoted composite pile significantly
Application range, be no longer limited to the use of Soft Soil Ground And Foundation reinforcing, while can be used for high-rise and Super High house pile foundation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of structure of the invention engineering pile.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the B-B sectional view of Fig. 1.
Specific embodiment
Referring to figures 1-3, the construction method of structure of the invention engineering pile, the Structural Engineering stake is by high-pressure rotary jet grouting pile
And prefabricated tubular pileIt is collectively formed and (is made of equal cores composite pile high-pressure rotary-spray+prefabricated tubular pile)；Compound pile construction method is first
Constructed high-pressure rotary jet grouting pile with triple-pipe high pressure jet grouting stake machine in middle hard place matter soil layer, for compared with Soft Soil Layer can using single tube or
Two-tube whirl spraying guarantees to reach designed elevation across soil layer, forms Fig. 1 and high-pressure rotary jet grouting pile shown in Fig. 2, whirl spraying of constructing
When stake, strict control cement consumption, cement consumption cannot be less than the 15% of whirl spraying quality of pile, after the completion of rotary churning pile pile, interval
1 ~ 3 hour, with static pressure machine by prefabricated tubular pile before cement does not solidifyIt is pressed into high-pressure rotary jet grouting pile, when construction, needs to configure two
Platform rotary churning pile and a static pressed pile are constructed simultaneously.Fig. 1 and Fig. 2 is both needed to the C30 concrete of filling H1 thickness at stake bottomIt is sealed
Bottom, H1 are not less than 1.5m.Stake top fills C30 concrete thickness H1, and H1 is not less than 1.5m, and anchor bar need to be arrangedAnd hoop
Muscle, anchor barAnd stirrupReinforcing bar determined according to prefabricated tubular pile diameter referring to related tubular pole atlas, supporting plateFor
The Q235B round plate of 5mm thickness.
The equal cores composite pile of high-pressure rotary-spray+prefabricated tubular pile of the present invention is as Structural Engineering stake in middle hard place matter soil layer
House construction engineering in application.The equal cores composite pile is as high-rise or Super High house pressure bearing pile or the resistance to plucking of basement
Stake.
Claims (5)
1. a kind of method of middle hard place matter soil layer constructing structure engineering pile, it is characterized in that: the Structural Engineering stake is by high-pressure rotary-spray
Stake and prefabricated tubular pile are collectively formed；Compound pile construction method is first to be applied with triple-pipe high pressure jet grouting stake machine in middle hard place matter soil layer
Work high-pressure rotary jet grouting pile, the cement consumption of strict control rotary churning pile, cement consumption is no less than the 15% of whirl spraying quality of pile, to rotary churning pile
After the completion of pile, prefabricated tubular pile is pressed into rotary churning pile after 1 ~ 3 hour with static pressure machine by interval, and prefabricated tubular pile stake is long and high-pressure rotary-spray
Stake stake is long identical, forms the cores composite piles such as high-pressure rotary-spray+prefabricated tubular pile.
2. according to the method described in claim 1, it is characterized in that: the clay in the middle hard place matter soil layer is plastic to hard plastic shape
State, sand be in low close state, rock stratum is strongly weathered sand-rock.
3. by the equal cores composite pile of high-pressure rotary-spray+prefabricated tubular pile that method as claimed in claim 1 or 2 obtains.
4. the equal cores composite pile of high-pressure rotary-spray+prefabricated tubular pile as claimed in claim 3 is as Structural Engineering stake in middle hard place matter soil
Application in the house construction engineering of layer.
5. application according to claim 4, it is characterized in that: the equal cores composite pile is as high-rise or Super High house work
Journey stake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910229708.7A CN109930593A (en) | 2019-03-25 | 2019-03-25 | A kind of Structural Engineering stake and construction method and its application in middle hard place matter soil layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910229708.7A CN109930593A (en) | 2019-03-25 | 2019-03-25 | A kind of Structural Engineering stake and construction method and its application in middle hard place matter soil layer |
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| Publication Number | Publication Date |
|---|---|
| CN109930593A true CN109930593A (en) | 2019-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910229708.7A Pending CN109930593A (en) | 2019-03-25 | 2019-03-25 | A kind of Structural Engineering stake and construction method and its application in middle hard place matter soil layer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117932715A (en) * | 2023-11-15 | 2024-04-26 | 中信建筑设计研究总院有限公司 | Method for determining optimal design control pile length of pressure-bearing engineering pile |
| CN117932715B (en) * | 2023-11-15 | 2024-07-16 | 中信建筑设计研究总院有限公司 | Method for determining optimal design control pile length of pressure-bearing engineering pile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117932715A (en) * | 2023-11-15 | 2024-04-26 | 中信建筑设计研究总院有限公司 | Method for determining optimal design control pile length of pressure-bearing engineering pile |
| CN117932715B (en) * | 2023-11-15 | 2024-07-16 | 中信建筑设计研究总院有限公司 | Method for determining optimal design control pile length of pressure-bearing engineering pile |
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Application publication date: 20190625 |