CN1233696A - Comprehensive foundation and its construction technology by using spiral soil lifting and pressure filling mortar for producing piles in situ - Google Patents
Comprehensive foundation and its construction technology by using spiral soil lifting and pressure filling mortar for producing piles in situ Download PDFInfo
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- CN1233696A CN1233696A CN 99103041 CN99103041A CN1233696A CN 1233696 A CN1233696 A CN 1233696A CN 99103041 CN99103041 CN 99103041 CN 99103041 A CN99103041 A CN 99103041A CN 1233696 A CN1233696 A CN 1233696A
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Abstract
The present invention relates to pressurized filling pile technology and the formed composite foundation, it is characterized in that long spiral drilling machine is used to drill at the pile position to designed depth, at the time of pulling out the drill, the prepared cement mortar is pressed into the hole through valve by concrete pump, the cement mortar displaces the soil in the hole to form a pile, so that the piles and soil between piles together act to bear the upper load of composite foundation. The invented technology can be used in different stratums, the soil quality and mortar material has no influence tothe process of forming pile and the formed pile body.
Description
The invention belongs to the realm of building construction, relate in particular to a kind of composite foundation of irritating stake technology and formation of pressing.
In Foundation Designs such as ground stabilization or other relevant works, the slip casing by pressure pile is a new construction technology, existing deep-mixed pile is to utilize Mixing Machine in soft foundation, drilling to completion, carry boring simultaneously and in weak soil, spray slurries or vaporific powder, stir by means of the shaft rotation simultaneously, slurries or powder and weak soil are are fully mixed and stirred, formation compressive strength is higher than the pile body of natural soil and tool globality, water stability.This pile body and foundation soil acting in conjunction constitute satisfies the composite foundation that superstructure requires.
Slurries inject process soft foundation has the following disadvantages:
1. in the coastal area,, influence the uniformity that stirs owing to soil body clay content difference,
Cause slurries and native mix inequality or the enrichment of partial water mud, form cement tuberculosis.
2. can't adjust emitted dose, the pile body intensity of formation according to the variation of stratum soil
Inhomogeneous up and down.
The powder jetting soft soil foundation has the following disadvantages:
1. the present powder of China sprays machine construction monitoring system imperfection, and non-combined operation is artificial
Factor is many, and is careless slightly, and the possibility that stirs irregular or broken pile is promptly arranged.
2. system sealing is bad, and cement flour is seriously polluted.
3. construction is subjected to water content influence in the soil body, and the soil body is moisture low, and powder is difficult to solidify,
Thereby influence the bearing capacity of pile body.
The objective of the invention is at above the deficiencies in the prior art, provide a kind of spiral to carry the composite foundation that the soil-cement mortar is pressed irrigation technology and formation, this technology is applicable in the various stratum, and formation of pile is not influenced by the soil body, the bearing capacity height of stake, and can once finish.
It is to adopt displacement pile construction principle that spiral of the present invention is carried soil-cement mortar pressure irrigation technology, with long auger machine drilling to completion on the stake site, carrying brill simultaneously, press in the hole at the valve on the drill bit by design with concrete pump and to record the cement mortar of getting ready, with cement mortar with soil displacement back pile in the hole, thereby form the composite foundation that upper load is born in stake and inter-pile soil acting in conjunction.Cement mortar of the present invention is formed by water, cement, sand and admixture cooperation, and admixture is flyash, quicklime etc., and its match ratio scope is as follows:
Water: 8-30%; Cement: 3-24%; Sand: 60-80%; Admixture: 0-15%
Admixture is flyash, quicklime and when not adding admixture, and the cement mortar mix ratio scope is respectively:
1. cement mortar (containing flyash) match ratio scope (by gross weight):
Water: 10-15%; Cement: 7-14%; Sand: 60-80%; Flyash: 0-15%
2. cement mortar (containing quicklime) match ratio scope (by gross weight);
Water: 20-30%; Cement: 3-13%; Quicklime: 0-6%; Medium sand: 60-80%;
3. cement mortar mix ratio scope (by gross weight):
Water: 8-14%; Cement: 5-24%; Medium sand: 60-80%;
Spiral of the present invention is carried the soil-cement mortar and is pressed irrigation technology can solve the problem that exists in the Deep Mixing Piles Construction, has following beneficial effect:
1. enlarged the scope of application of deep-mixed pile, it is applicable in the various stratum,
Its application can solve owing to clay content height in the soil layer, water content is low causes
Pile difficulty, the deficiency that pile strength can't guarantee.
2. owing to after present technique is soil taking hole forming, press materials such as the silt particle slurry of pouring water again continuously,
Formed that pile body is continuous, the uniform pile body of pile strength, its do not exist because of slurries,
Powder stirs inhomogeneous with soil and causes pile quality, intensity can not satisfy design and want
The shortcoming of asking.
3. the selected constructional materials of present technique method is extensive, can be not limited to a kind of or several
Kind, it can select different materials for use according to engineering properties.Can select for use flyash etc. useless
Abandon material, not only can reduce construction costs, can also play the work of protection environment
With.
4. technology is simple, and speed of application is fast, the bearing capacity height, and material requested is common to be easy to get,
Be easy to apply.
Fig. 1 carries the process chart that the soil-cement mortar is pressed irrigation technology for spiral of the present invention.
Below be embodiments of the invention.
Embodiment 1:
Certain ore terminal 2
#The rail beam pile foundation adopts long spiral to carry the soil-cement mortar and presses the filling pile driving construction, and design stake footpath is φ 400mm, and stake is long to be 13.0m, and strength of the mixing pile is not less than 3.0Mpa, and the employing grid type lays out pile 17440 of total amount of pile.
This project district distribution of strata situation from top to bottom is followed successively by 1. dredger fill sandy soil, and bed thickness is 6-7m; 2. silt clay, bed thickness is about 6m; 3. strong-weathered rock.
For eliminating the influence of stratum to strength of the mixing pile, adopt spiral to carry soil-cement mortar (adding flyash) and press the filling stake, strength of cement mortar is 3.0Mpa, adopts 425
#Cement, extra large sand, flyash, water, cement, sand, flyash match ratio are (by weight) 1.35: 1: 5: 1.2, every m
3Consumption (by weight) is 378Kg, 280Kg, 1400Kg, 336Kg.
After construction finishes, power nondestructive testing pile body integrity, qualification rate 98% have been carried out in the stake of total amount of pile 10%, acceptance rate 92%, strength of the mixing pile reaches 3.2Mpa, and Bearing Capacity of Composite Foundation is 270Kpa, all reach designing requirement, and this construction technology is simple, speed of application is fast.
Embodiment 2:
Certain stockyard, ore terminal district pile foundation adopts spiral to carry the soil-cement mortar and presses the filling pile driving construction, and design stake footpath is φ 400mm, and stake is long to be 13.0m, and strength of the mixing pile is not less than 3.0Mpa, and the employing grid type lays out pile 12560 of total amount of pile.
This project district distribution of strata situation from top to bottom is followed successively by 1. dredger fill sandy soil, and bed thickness is 6-7m; 2. silt clay, bed thickness is about 6m; 3. strong-weathered rock.
For eliminating the influence of stratum to strength of the mixing pile, adopt spiral to carry soil-cement mortar (adding quicklime) and press the filling stake, strength of cement mortar is 3.0Mpa, adopts water, 425
#Cement, quicklime, medium sand, its match ratio are (by weight) 4.4: 1: 0.82: 12.9, and every m
3Consumption (by weight) is 546Kg, 124Kg, 102Kg, 1603Kg.
After construction finishes, power nondestructive testing pile body integrity has been carried out in the stake of total amount of pile 10%, qualification rate 98%, acceptance rate 90%, strength of the mixing pile reaches 3.4Mpa, and Bearing Capacity of Composite Foundation is 280Kpa, all reaches designing requirement.
Embodiment 3:
Certain chemical industry group pile foundation engineering adopts spiral to carry the soil-cement mortar and presses the filling pile driving construction, and design stake footpath is φ 500mm, and stake is long to be 11.0m, strength of the mixing pile is 3.0Mpa, adopts square to lay out pile pile spacing 1.5m, bearing capacity of single pile is 170KN, and Bearing Capacity of Composite Foundation is 155KN.
Stratum, this project district is mainly Holocene series terrestrial facies impact in the Quaternary Period and heavy cohesive soil, silt and the flour sand that hits of marine facies.
Material of body of a pile adopts cement mortar, respectively with adopting 425
#Cement, medium sand, water, cement mortar mix ratio are (by weight) 1: 8.5: 1.2, every m
3Consumption (by weight) is respectively 184Kg, 1564Kg, 221Kg.
Construction detects stake after finishing, and qualification rate 95%, acceptance rate reach more than 90%, and strength of the mixing pile reaches 3.2Mpa, and Bearing Capacity of Composite Foundation is 158Kpa, all reaches designing requirement.
Embodiment 4:
Certain chemical fertilizer factory's pile foundation engineering adopts spiral to carry the soil-cement mortar and presses the filling pile driving construction, and design stake footpath is φ 500mm, and stake is long to be 9.5m, strength of the mixing pile is 3.0Mpa, adopts equilateral triangle to lay out pile pile spacing 1.6m, bearing capacity of single pile is 180KN, and Bearing Capacity of Composite Foundation is 160KN.
Mainly banket on the stratum in this project district, silty clay, sand gravel mix cohesive soil, flour sand, powder fine sand.
Material of body of a pile adopts cement mortar, respectively with adopting 425
#Cement, medium sand, water, cement mortar mix ratio are (by weight) 1: 8.5: 1.2, every m
3Consumption (by weight) is respectively 180Kg, 1530Kg, 216Kg.
Construction detects stake after finishing, and qualification rate 96%, acceptance rate reach more than 90%, and strength of the mixing pile reaches 3.1Mpa, and Bearing Capacity of Composite Foundation is 163Kpa, all reaches designing requirement.
Claims (3)
1. a spiral is carried the soil-cement mortar and is pressed irrigation technology, adopt displacement pile construction principle, it is characterized in that: with long auger machine drilling to completion on the stake site, carrying brill simultaneously, press in the hole at the valve on the drill bit by design with concrete pump and to record the cement mortar of getting ready, with the disposable pile in soil displacement back in the hole, cement mortar is formed by water, cement, sand and admixture cooperation with cement mortar, and its match ratio scope is as follows:
Water: 8-30%; Cement: 3-24%; Sand: 60-80%; Admixture: 0-15%
2. pressure irrigation technology as claimed in claim 1 is characterized in that described admixture is flyash or quicklime, and its match ratio scope is as follows:
Cement mortar (containing flyash) match ratio scope (by gross weight):
Water: 10-15%; Cement: 7-14%; Sand: 60-80%; Flyash: 0-15%
Cement mortar (containing quicklime) match ratio scope (by gross weight):
Water: 20-30%; Cement: 3-13%; Quicklime: 0-6%; Medium sand: 60-80%;
Cement mortar mix ratio scope (by gross weight):
Water: 8-14%; Cement: 5-24%; Medium sand: 60-80%;
3. a composite foundation is characterized in that adopting the described pressure irrigation technology of claim 1, is formed by stake and inter-pile soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99103041 CN1233696A (en) | 1999-03-22 | 1999-03-22 | Comprehensive foundation and its construction technology by using spiral soil lifting and pressure filling mortar for producing piles in situ |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99103041 CN1233696A (en) | 1999-03-22 | 1999-03-22 | Comprehensive foundation and its construction technology by using spiral soil lifting and pressure filling mortar for producing piles in situ |
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| Publication Number | Publication Date |
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| CN1233696A true CN1233696A (en) | 1999-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 99103041 Pending CN1233696A (en) | 1999-03-22 | 1999-03-22 | Comprehensive foundation and its construction technology by using spiral soil lifting and pressure filling mortar for producing piles in situ |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100374658C (en) * | 2006-01-12 | 2008-03-12 | 上海交通大学 | Stirring shaft capable of decreasing ambient foundation deformation for deep mixing pile |
| CN100374657C (en) * | 2006-01-12 | 2008-03-12 | 上海交通大学 | Construction method employing threaded stirring shaft to decrease ambient foundation deformation |
| CN100386484C (en) * | 2005-07-07 | 2008-05-07 | 何世鸣 | New type cement soil pile and its construction method |
| CN101487251A (en) * | 2009-02-23 | 2009-07-22 | 徐玉杰 | Construction method of premixing pouring soil cement pile used for strengthening ground and pile produced thereby |
| CN103898897A (en) * | 2012-12-26 | 2014-07-02 | 株式会社不动堤土乐 | Connecting shaft of excavating and stirring shaft |
| CN109441357A (en) * | 2018-12-24 | 2019-03-08 | 谢金良 | A kind of drilling tool and construction method for the compacted pore-creating filling pile of long spire |
-
1999
- 1999-03-22 CN CN 99103041 patent/CN1233696A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100386484C (en) * | 2005-07-07 | 2008-05-07 | 何世鸣 | New type cement soil pile and its construction method |
| CN100374658C (en) * | 2006-01-12 | 2008-03-12 | 上海交通大学 | Stirring shaft capable of decreasing ambient foundation deformation for deep mixing pile |
| CN100374657C (en) * | 2006-01-12 | 2008-03-12 | 上海交通大学 | Construction method employing threaded stirring shaft to decrease ambient foundation deformation |
| CN101487251A (en) * | 2009-02-23 | 2009-07-22 | 徐玉杰 | Construction method of premixing pouring soil cement pile used for strengthening ground and pile produced thereby |
| CN103898897A (en) * | 2012-12-26 | 2014-07-02 | 株式会社不动堤土乐 | Connecting shaft of excavating and stirring shaft |
| CN103898897B (en) * | 2012-12-26 | 2015-04-22 | 株式会社不动堤土乐 | Connecting shaft of excavating and stirring shaft |
| CN109441357A (en) * | 2018-12-24 | 2019-03-08 | 谢金良 | A kind of drilling tool and construction method for the compacted pore-creating filling pile of long spire |
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