CN104234047A - Composite pile made by jointly embedding nodular pile and tubular pile into cement-soil mixed soil-nailed pile - Google Patents
Composite pile made by jointly embedding nodular pile and tubular pile into cement-soil mixed soil-nailed pile Download PDFInfo
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- CN104234047A CN104234047A CN201310503654.1A CN201310503654A CN104234047A CN 104234047 A CN104234047 A CN 104234047A CN 201310503654 A CN201310503654 A CN 201310503654A CN 104234047 A CN104234047 A CN 104234047A
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Abstract
The invention discloses a composite pile structure made by jointly embedding a nodular pile and a tubular pile into a cement-soil mixed soil-nailed pile. The structure comprises a large-diameter cement-soil mixed pile, a small-diameter cement-soil mixed pile, the nodular pile, the tubular pile and a pile core. The large-diameter cement-soil mixed pile and the small-diameter cement-soil mixed pile are made into a soil-nailed pile by soil mixing and high-pressure cement injecting. The nodular pile and the tubular pile are fabricated in a factory. Before initial setting of cement and soil, the cement and soil is fed into the cement-soil mixed pile by pile foundation static pressure; the pile core is connected by welding or via a flange. The composite pile structure has the advantages that construction is convenient and free of flaws, comprehensive bearing capacity is high, manufacture cost is low, construction speed is high, no mud is conveyed out during construction, and a social effect is good.
Description
Technical field:
The present invention relates to Geotechnical Engineering field, particularly a kind of bamboo joint pile and pile tube embed the composite pile of Soil-cement soil nailing stake jointly.
Background technology:
Pile foundation has that bearing capacity of single pile is high, sedimentation is little, making is flexible and the advantage such as applicable elements is extensive, is present stage one of widely used main foundation form.Current pile foundation construction mainly adopts bored pile construction method and construction of prefabricated piles method.
Bored pile refers to and in foundation soil, forms stake holes at engineering site by means such as machine drilling, steel pipe soil compaction or manpower excavations, and place reinforcing cage, concrete perfusion and the stake of making within it, it has the features such as construction technology is simple, low cost, but have also discovered shortcomings in engineering reality.1. in filling pile construction, necking down, pile bottom sediment etc. happen occasionally, quality fluctuation is large, 2. has a large amount of mud emissions, particularly in metropolis, become social concern, and job site is difficult to keep clean and tidy, civilized construction difficulty is large, 3. speed of application is slow, efficiency is low, and stake top mark height easily occurs uneven, 4. concrete strength is low, generally at about C30.As can be seen here, existing bored pile construction method and economy development of coastal area level not in tune.
Preformed pile refers to the various materials made in factory or job site, various forms of stake (as timber, concrete square pile, prestressed concrete pipe pile, piling bar etc.), in stake being squeezed into, be pressed into or shake bury with sinking apparatus.There is the advantages such as intensity is high, steady quality, saving duration, therefore extensive use in engineering due to preformed pile.Equally, construction of prefabricated piles method also also exists many drawbacks, 1. preformed pile squeezes into the soil that will inevitably extrude surrounding in process, impact is had on undreground works, pipeline etc., 2. in the engineering of piling, a large amount of noise pollutions is produced, 3. penetrating various interlayer is that difficult, stake top mark is high-leveled and difficult to control, and 4. produce larger infringement to pile body in construction, 5. extraction-resistant behavior is not strong.
Based on above factor, create the composite pile construction method of pile tube lock pin cement mixing method, namely before cement mixing method initial set, insert prefabricated tubular pile, when namely cement-soil final set define the composite pile of pile tube lock pin cement mixing method later, this technique has following advantage, 1. without the need to poured in place concrete, necking can not be produced, 2. with being 25% of filling pile slurry discharge value under bearing capacity condition, 3. Comprehensive Capacity is strong, bearing capacity ofconcreting is high, economize on resources, 4. because prefabricated tubular pile inserts before cement-soil initial set, therefore difficulty of construction reduces greatly.
Find in the process studied pile shaft force, pile shaft force constantly reduces along with the increase of the degree of depth, that is, pile body top is subject to larger load, and along with the interaction of stake soil, a part of stress is born by soil, and therefore pile body stress constantly can reduce with the degree of depth.Therefore, traditional equal-diameter pile can cause a large amount of wastings of resources, increases construction cost.
Vertical ultimate bearing capacity of single pile standard value refers to the maximum load that single pile is corresponding before vertical uniform load q is issued to collapse state or when there is being unsuitable for the distortion continuing carrying, depend on that soil is to the support resistance of stake and bearing capacity of pile, namely soil should give full play to the support resistance of stake and bearing capacity of pile simultaneously.But disclosed major diameter composite pile SMIS stake and outer cement earth pile only interact by frictional resistance at present, cause core pile material intensity and soil around pile can not play the pile side friction that outer cement-soil provides simultaneously.
Summary of the invention:
Object of the present invention is exactly the composite pile structure that a kind of bamboo joint pile of proposition and pile tube embed the stake of Soil-cement soil nailing jointly, and it is simple that this composite pile structure has construction technology, and bearing capacity is high, and cost is low, pollution-free, the advantages such as short construction period.
In order to achieve the above object, the present invention by the following technical solutions.
Bamboo joint pile and pile tube embed the composite pile of Soil-cement soil nailing stake jointly, it comprises major diameter cement mixing method (1), small-diameter soil-cement agitation pile (2), bamboo joint pile (3), pile tube (4) is connected (5) with core stake, it is characterized in that: the diameter of described major diameter cement mixing method is 800 ~ 2000mm, length is 10 ~ 40m; The diameter of described small-diameter soil-cement agitation pile is 600 ~ 1500mm, length is 10 ~ 30m; The diameter of described bamboo joint pile is 300 ~ 500mm, and wall thickness is 100 ~ 150mm, and slub space is 0.5 ~ 1.5m; The diameter of described pile tube is 300 ~ 500mm, and wall thickness is 100 ~ 150mm; Diameter, the wall thickness of described bamboo joint pile and pile tube are identical, described bamboo joint pile is identical with major diameter Soil-cement pile length, pile tube is identical with small-diameter soil-cement agitation pile length, described pile tube is 0.33 ~ 0.5 with the diameter ratio of minor diameter cement mixing pile, pile tube is 0.375 ~ 0.5 with the diameter ratio of major diameter cement mixing pile, bamboo joint pile and pile tube upper and lower side before cement mixing method initial set, enter design elevation from outer Soil-cement pile center static pressure after closing.
First carry out the making of minor diameter agitation pile, design elevation at the bottom of stake is arrived by first lower for drill bit, then limit rotary drilling-head, limit promotes drilling rod, and by drill bit to inject high pressure cement paste in soil, when rising to absolute altitude at the bottom of the stake of major diameter cement mixing method, by hydraulic means, small diameter drill bit is stretched to major diameter drill bit, continues to stir lifting, and inject high pressure cement paste, until drill bit is unearthed.
Described bamboo joint pile is prestressed high-strength reinforced concrete pile, and length is 5 ~ 10m, and be prefabricated in the factory production, and two ends are closed with steel plate respectively, adopts welding or Flange joint form during pile extension.
Described pile tube is prestressed high-strength reinforced concrete pile, and length is 5 ~ 10m, and be prefabricated in the factory production, and two ends are closed with steel plate respectively, adopts and be welded to connect form during pile extension.
Described bamboo joint pile adopts with the connection of pile tube and welds or Flange joint form.
This composite pile structure has the following advantages: 1. easy construction, necking down can not be produced, folder mud, the defects such as segregation, 2. major diameter cement mixing method and small-diameter soil-cement agitation pile are combined into up big and down small soil nailing stake, bearing power increase, and the core stake of top major diameter cement earth pile adopts bamboo joint pile, bamboo joint pile and the existing frictional resistance of cement earth pile, there is supporting force again, Comprehensive Capacity improves, 3. bottom adopts small-diameter soil-cement composite pile, save material, reduce cost, 4. transport outward without mud in construction, social effect is good, 5. speed of application is fast, reduction of erection time, 6. pile extension is more flexible, both welding manner can be adopted, also flange can be adopted to connect.
Accompanying drawing illustrates:
Fig. 1 is the composite pile schematic diagram that bamboo joint pile and pile tube embed the stake of Soil-cement soil nailing jointly.
Fig. 2 is core stake schematic diagram.
Fig. 3 is the position view of core stake in the stake of Soil-cement soil nailing.
Fig. 4 is that pile shaft force is with change in depth schematic diagram.
In figure: 1, major diameter cement mixing method, 2, small-diameter soil-cement agitation pile, 3, bamboo joint pile, 4, pile tube, 5, ring, 6, core stake connects.
Detailed description of the invention:
Embodiment: further illustrate the composite pile concrete construction method that bamboo joint pile and pile tube embed the stake of Soil-cement soil nailing jointly below in conjunction with accompanying drawing:
(1) bamboo joint pile (3) and pile tube (4) have been prefabricated in the factory, have transported to job site.
(2) clear up construction plant, determine pile foundation center, driller insertion.
(3) drill bit of drilling machine diameter is adjusted to the size of small-diameter soil-cement agitation pile diameter, under be drilled into design elevation, inject high pressure cement paste limit, limit promotes drilling rod, when rising to predetermined absolute altitude, by the size that hydraulic means adjustment bit diameter is major diameter cement mixing method diameter, continue inject high pressure cement paste and promote drilling rod until arrive ground level.
(4) rig moves to next pile foundation position, and static pressure pile foundation is in place, enters cement-soil by pile tube from cement mixing method center static pressure, and pile tube adopts welding manner to carry out pile extension, until it is long to reach predetermined pipe pile.
(5) when pile tube length reach predetermined stake long time bamboo joint pile is connected with pile tube, connected mode can adopt welding or Flange joint, then continue piling, until it is long to reach predetermined bamboo joint pile stake.
(6) repeat the above-mentioned step of (1) (5), finally complete whole pile foundation construction work, maintenance 7d.
The present invention has the following advantages: 1. easy construction, necking down can not be produced, folder mud, the defects such as segregation, 2. major diameter cement mixing method and small-diameter soil-cement agitation pile are combined into up big and down small soil nailing stake, bearing power increase, and the core stake of top major diameter cement earth pile adopts bamboo joint pile, bamboo joint pile and the existing frictional resistance of cement earth pile, there is supporting force again, Comprehensive Capacity improves, 3. bottom adopts small-diameter soil-cement composite pile, save material, reduce cost, 4. transport outward without mud in construction, social effect is good, 5. speed of application is fast, reduction of erection time, 6. pile extension is more flexible, both welding manner can be adopted, also flange can be adopted to connect.
Claims (5)
1. a bamboo joint pile and pile tube embed the composite pile of Soil-cement soil nailing stake jointly, it comprises major diameter cement mixing method (1), small-diameter soil-cement agitation pile (2), bamboo joint pile (3), pile tube (4) is connected (5) with core stake, it is characterized in that: the diameter of described major diameter cement mixing method is 800 ~ 2000mm, length is 10 ~ 40m; The diameter of described small-diameter soil-cement agitation pile is 600 ~ 1500mm, length is 10 ~ 30m; The diameter of described bamboo joint pile is 300 ~ 500mm, and wall thickness is 100 ~ 150mm, and slub space is 0.5 ~ 1.5m; The diameter of described pile tube is 300 ~ 500mm, and wall thickness is 100 ~ 150mm; Diameter, the wall thickness of described bamboo joint pile and pile tube are identical, described bamboo joint pile is identical with major diameter Soil-cement pile length, pile tube is identical with small-diameter soil-cement agitation pile length, described pile tube is 0.33 ~ 0.5 with the diameter ratio of minor diameter cement mixing pile, pile tube is 0.375 ~ 0.5 with the diameter ratio of major diameter cement mixing pile, bamboo joint pile and pile tube upper and lower side before cement mixing method initial set, enter design elevation from outer Soil-cement pile center static pressure after closing.
2. bamboo joint pile according to claim 1 and pile tube embed the composite pile of Soil-cement soil nailing stake jointly, it is characterized in that the making first carrying out minor diameter agitation pile, design elevation at the bottom of stake is arrived by first lower for drill bit, then limit rotary drilling-head, limit promotes drilling rod, and by drill bit to inject high pressure cement paste in soil, when rising to absolute altitude at the bottom of the stake of major diameter cement mixing method, pass through hydraulic means, small diameter drill bit is stretched to major diameter drill bit, continue to stir and promote, and inject high pressure cement paste, until drill bit is unearthed.
3. bamboo joint pile according to claim 1 and pile tube embed the composite pile of Soil-cement soil nailing stake jointly, it is characterized in that described bamboo joint pile is prestressed high-strength reinforced concrete pile, length is 5 ~ 10m, be prefabricated in the factory production, two ends are closed with steel plate respectively, adopt welding or Flange joint form during pile extension.
4. bamboo joint pile according to claim 1 and pile tube embed the composite pile of Soil-cement soil nailing stake jointly, it is characterized in that described pile tube is prestressed high-strength reinforced concrete pile, length is 5 ~ 10m, be prefabricated in the factory production, two ends are closed with steel plate respectively, adopt and be welded to connect form during pile extension.
5. bamboo joint pile according to claim 1 and pile tube embed the composite pile of Soil-cement soil nailing stake jointly, it is characterized in that described bamboo joint pile adopts with the connection of pile tube and weld or Flange joint form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310503654.1A CN104234047A (en) | 2013-10-22 | 2013-10-22 | Composite pile made by jointly embedding nodular pile and tubular pile into cement-soil mixed soil-nailed pile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310503654.1A CN104234047A (en) | 2013-10-22 | 2013-10-22 | Composite pile made by jointly embedding nodular pile and tubular pile into cement-soil mixed soil-nailed pile |
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| CN104234047A true CN104234047A (en) | 2014-12-24 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104805834A (en) * | 2015-04-29 | 2015-07-29 | 上海市机械施工集团有限公司 | Cast-in-place and precast integrated pile (ICP pile) and manufacturing method thereof |
| CN105002895A (en) * | 2015-06-30 | 2015-10-28 | 周兆弟 | Multiple-drill-rod cement-soil mixing pile inserting prefabricated profiles |
| CN105019440A (en) * | 2015-06-30 | 2015-11-04 | 周兆弟 | Control tower pile used for manufacturing high-strength cemented soil mixing pile |
| CN105604001A (en) * | 2016-01-11 | 2016-05-25 | 王庆伟 | Stiffening core cement-soil tubular pile, construction method and cylindrical rotary stirring drilling tool |
| CN107700480A (en) * | 2017-11-21 | 2018-02-16 | 中淳高科桩业股份有限公司 | A kind of concrete-pile suitable for basement process |
| CN107882024A (en) * | 2016-09-30 | 2018-04-06 | 上海城地建设股份有限公司 | Prestressing force prefabricated components screw pile |
| CN110389060A (en) * | 2019-07-01 | 2019-10-29 | 浙江大学 | A kind of bamboo joint pile-cement soil contact face sample preparation device and contact surface frictional behavior research shearing test device and test method |
-
2013
- 2013-10-22 CN CN201310503654.1A patent/CN104234047A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104805834A (en) * | 2015-04-29 | 2015-07-29 | 上海市机械施工集团有限公司 | Cast-in-place and precast integrated pile (ICP pile) and manufacturing method thereof |
| CN105002895A (en) * | 2015-06-30 | 2015-10-28 | 周兆弟 | Multiple-drill-rod cement-soil mixing pile inserting prefabricated profiles |
| CN105019440A (en) * | 2015-06-30 | 2015-11-04 | 周兆弟 | Control tower pile used for manufacturing high-strength cemented soil mixing pile |
| WO2017000529A1 (en) * | 2015-06-30 | 2017-01-05 | 周兆弟 | Multi-drill soil-cement mixed pile with inserted prefabricated section bars |
| CN105604001A (en) * | 2016-01-11 | 2016-05-25 | 王庆伟 | Stiffening core cement-soil tubular pile, construction method and cylindrical rotary stirring drilling tool |
| CN107882024A (en) * | 2016-09-30 | 2018-04-06 | 上海城地建设股份有限公司 | Prestressing force prefabricated components screw pile |
| CN107700480A (en) * | 2017-11-21 | 2018-02-16 | 中淳高科桩业股份有限公司 | A kind of concrete-pile suitable for basement process |
| CN107700480B (en) * | 2017-11-21 | 2023-08-18 | 宁波中淳高科股份有限公司 | Concrete pile suitable for foundation treatment |
| CN110389060A (en) * | 2019-07-01 | 2019-10-29 | 浙江大学 | A kind of bamboo joint pile-cement soil contact face sample preparation device and contact surface frictional behavior research shearing test device and test method |
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Application publication date: 20141224 |