CN206495202U - A kind of top expansion type cement-soil composite pile - Google Patents

A kind of top expansion type cement-soil composite pile Download PDF

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Publication number
CN206495202U
CN206495202U CN201621323492.9U CN201621323492U CN206495202U CN 206495202 U CN206495202 U CN 206495202U CN 201621323492 U CN201621323492 U CN 201621323492U CN 206495202 U CN206495202 U CN 206495202U
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pile
cement
soil
hypomere
expansion type
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周同和
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周同和
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Abstract

A kind of top expansion type cement-soil composite pile, including prefabricated concrete pipe pile, centre bore is set in the prefabricated concrete pipe pile, the first cement earth pile of filling in centre bore, second cement earth pile is set outside prefabricated concrete pipe pile, second cement earth pile includes upper and lower two sections, and the stake footpath of epimere is more than the stake footpath of hypomere, and the first variable diameters section is set between epimere and hypomere.With compared with the pile body of the single diameter of the concrete amounts such as length, bearing capacity of pile foundation of the present utility model is higher, can be on the premise of ensureing to meet design bearing capacity requirement, realize that stake is long shorter, the capability development of pile foundation side resistance simultaneously is higher, particularly suitable for the geological conditions that bottom soil layer is substantially better than applied to upper soil horizon.

Description

A kind of top expansion type cement-soil composite pile
Technical field
The utility model belongs to foundation engineering technical field, and in particular to a kind of top expansion type cement-soil composite pile.
Background technology
With the development of building trade, construction scope increasingly increases, and the additional load of ground is increasing, high for part Layer, high-rise building, subsoil and composite foundation can not meet ground requirement for bearing capacity, it is this under the conditions of, pile foundation is A kind of base form generally used.It is preferable for some areas pile foundation upper soil horizon engineering properties, hence it is evident that better than under pile body During portion's soil layer, typically using increasing, stake is long to penetrate soft layer or increase stake footpath improves collateral resistance and ensures that pile foundation is carried to pile foundation Power, pile-type typically uses cast-in-situ bored pile or static pressure, driven precast pile etc..Bored pile construction process is:
(1)Plant equipment and material enter job site;
(2)Measure of pile position setting-out;
(3)Embedded casing;
(4)Rig simultaneously pore-forming in place;
(5)Borehole cleaning, lifts steel reinforcement cage;
(6)Conduit, concrete perfusion are installed;
(7)Casing is removed, pile crown is cut;
(8)Pile body is detected.
Generally used although above-mentioned technique is existing, using still suffering from problems with thicker soft layer:
1)The influence of deduction negative friction is needed during pile foundation size design, stake footpath, the long corresponding increase of stake cause a large amount of waves Take;
2)Filling pile construction has higher requirements to filling concrete process, and filling process should ensure that continuously, otherwise easily occurs Pile breaking phenomenon.
Utility model content
The purpose of this utility model is that providing a kind of top expansion type soil cement is combined pile tube.
Based on above-mentioned purpose, the utility model is adopted the following technical scheme that:
Set in a kind of top expansion type cement-soil composite pile, including prefabricated concrete pipe pile, the prefabricated concrete pipe pile Put in centre bore, centre bore and the second cement earth pile, second water are set outside the first cement earth pile of filling, prefabricated concrete pipe pile Soil stake includes upper and lower two sections, and the stake footpath of epimere is more than the stake footpath of hypomere, and the first variable diameters section is set between epimere and hypomere.
Muscle body is uniformly distributed along the side wall of prefabricated concrete pipe pile, muscle external week, stirrup was set.
The prefabricated concrete pipe pile includes upper and lower two sections, and the stake footpath of epimere is more than the stake footpath of hypomere, epimere and hypomere it Between the second variable diameters section is set, the height of the epimere of the prefabricated concrete pipe pile, the first variable diameters section and hypomere is respectively with the The epimere of two cement earth piles, the second variable diameters section are equal with the height of hypomere.
The trend of the muscle body is consistent with the trend of prefabricated concrete pipe pile side wall.
First variable diameters section, the second variable diameters section and the angle of the first cement earth pile axis are not more than 12 °.
The cement earth pile is cement mixing method or soil cement bored concrete pile.
The stake footpath of second cement earth pile is more than the external diameter at least 20mm of prefabricated concrete pipe pile.
The epimere of second cement earth pile is located at compared with hard stratum, the hypomere of the first variable diameters section and the second cement earth pile be located at compared with Soft Soil Layer.
It is described be compared with hard stratum in close-dense state layer of sand, the cohesive soil of hard plastic-hardened condition, the powder of dense state Mixing more than one or both of soil;The cohesive soil for moulding shape for soft modeling-stream compared with Soft Soil Layer.
Compared with prior art, technique effect of the present utility model is:
1)With compared with the pile body of the single diameter of the concrete amounts such as length, bearing capacity of pile foundation of the invention is higher, can On the premise of ensureing to meet design bearing capacity requirement, realize that stake is long shorter, while the capability development of pile foundation side resistance is higher, especially It is suitable for the application of the geological conditions that bottom soil layer is substantially better than in upper soil horizon;
2)Stake is overall to be presented the structure type that top stake footpath is big, bottom stake footpath is small, can be had upper soil horizon collateral resistance Effect is played;
3)Pile body sets variable diameters section, makes to form the natural transition of taper between composite foundation pile top and bottom, be conducive on Portion's load transmits downwards, increases the performance of bottom pile bearing capacity, while also saving perfusion pile material;
4)Easy construction, saving material, the prefabricated concrete pipe pile used can shorten live man-hour for prefabricated components, its Intensity is higher compared with cast-in-situ concrete poured stake, and interior equipped with prestressed steel bar, it is not easy to occur cracking destruction phenomenon;It is prefabricated Without taking out after concrete tubular pile insertion, easy construction and effect is good;Saved under identical anti-bending bearing capacity more concrete and Reinforcing bar.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the cross section structure schematic diagram of prefabricated concrete pipe pile in the utility model;
Fig. 3 is construction procedure of the present utility model(1)Structural representation;
Fig. 4 is construction procedure of the present utility model(2)Structural representation;
Fig. 5 is the construction procedure of utility model(3)Structural representation.
Embodiment
The utility model is described further with reference to specific embodiment.
A kind of top expansion type cement-soil composite pile as depicted in figs. 1 and 2, including prefabricated concrete pipe pile 2, the water Soil stake is cement mixing method or soil cement bored concrete pile.Set in centre bore, centre bore and fill out in the prefabricated concrete pipe pile 2 The first cement earth pile is filled, prefabricated concrete pipe pile 2 is outer to set the second cement earth pile 1, and second cement earth pile 1 includes upper and lower Two sections, the stake footpath of epimere 11 is more than the stake footpath of hypomere 13, and the stake footpath of the epimere 11 of the second cement earth pile 1 is 820mm, the stake of hypomere 13 Footpath is that the first variable diameters section 12 is set between 620mm epimeres 11 and hypomere 13.
The prefabricated concrete pipe pile 2 includes upper and lower two sections, and the stake footpath of epimere 21 is more than the stake footpath of hypomere 23, prefabricated mixed 2 epimere of solidifying soil pile tube 21 diameter 800mm, hypomere 23 diameter 600mm, internal diameter 400mm, second is set between epimere 21 and hypomere 23 Variable diameters section 22, the height of the epimere 21 of the prefabricated concrete pipe pile 2, variable diameters section 22 and hypomere 23 respectively with the second cement The epimere 11 of native stake 1, the first variable diameters section 12 are equal with the height of hypomere 13.First variable diameters section, the second variable diameters Duan Yu The angle of one cement earth pile axis is not more than 12 °.The epimere 11 of second cement earth pile 1 is located at compared with hard stratum, the first variable diameters section 12 and second cement earth pile 1 hypomere 13 be located at compared with Soft Soil Layer.It is described be compared with hard stratum 4 in close-dense state layer of sand(Firmly The cohesive soil of modeling-hardened condition, the silt of dense state);The cohesive soil for moulding shape for soft modeling-stream compared with Soft Soil Layer 5.Described The stake footpath of the epimeres 11 of two cement earth piles 1, the first variable diameters section 12 and hypomere 13 is respectively greater than the epimere of prefabricated concrete pipe pile 2 21st, the external diameter at least 20mm of the second variable diameters section 22 and hypomere 23.
Muscle body 3, trend and the side wall of prefabricated concrete pipe pile 2 of muscle body 3 are uniformly distributed along the side wall of prefabricated concrete pipe pile 2 Trend it is consistent, the periphery of muscle body 3 sets stirrup 6.
The cement earth pile is soil cement bored concrete pile, its construction technology, as shown in Fig. 3, Fig. 4 and Fig. 5, including following step Suddenly:(1)Using rig or manual pore-forming, top aperture is larger, and bottom aperture is smaller;(2)Priming petock soil 7 in hole;(3)Perfusion Soil cement produce intensity before, be implanted into prefabricated concrete pipe pile;(4)Pile body is detected.Soil cement intensity is no less than 10MPa.
When the cement earth pile is cement mixing method, its construction technology is to comprise the following steps:(1)Top is larger straight Footpath section stake rig pore-forming, reaches to change minor diameter behind large diameter pile bottom and open drilling tool and creeps into;(2)Slip casting is stirred from the bottom to top Mix, drilling tool is opened when stirring to enlarged diameter section pile body and is stirred;(3)Stirring concrete earth is produced before intensity, is implanted into prefabricated mixed Solidifying soil pile body;(4)Pile body is detected.Soil cement intensity is no less than 10MPa.

Claims (9)

1. a kind of top expansion type cement-soil composite pile, it is characterised in that including prefabricated concrete pipe pile, the precast concrete Set in pile tube in centre bore, centre bore and the second cement earth pile, institute are set outside the first cement earth pile of filling, prefabricated concrete pipe pile Stating the second cement earth pile includes upper and lower two sections, and the stake footpath of epimere is more than the stake footpath of hypomere, sets first to become between epimere and hypomere Diameter segment.
2. expansion type cement-soil composite pile in top as claimed in claim 1, it is characterised in that along the side of prefabricated concrete pipe pile Wall is uniformly distributed muscle body, sets stirrup in muscle external week.
3. expansion type cement-soil composite pile in top as claimed in claim 2, it is characterised in that the prefabricated concrete pipe pile bag Upper and lower two sections are included, the stake footpath of epimere is more than the stake footpath of hypomere, the second variable diameters section is set between epimere and hypomere, it is described prefabricated Epimere, the second variable diameters of the height of the epimere of concrete tubular pile, the first variable diameters section and hypomere respectively with the second cement earth pile Section is equal with the height of hypomere.
4. expansion type cement-soil composite pile in top as claimed in claim 3, it is characterised in that the trend of the muscle body with it is prefabricated The trend of concrete tubular pile side wall is consistent.
5. expansion type cement-soil composite pile in top as claimed in claim 1, it is characterised in that the first variable diameters section, second become Diameter segment and the angle of the first cement earth pile axis are not more than 12 °.
6. the top expansion type cement-soil composite pile as described in claim 1-5 is any, it is characterised in that the cement earth pile is Cement mixing method or soil cement bored concrete pile.
7. expansion type cement-soil composite pile in top as claimed in claim 6, it is characterised in that the stake of second cement earth pile Footpath is more than the external diameter at least 20mm of prefabricated concrete pipe pile.
8. expansion type cement-soil composite pile in top as claimed in claim 7, it is characterised in that the upper section of the second cement earth pile It is located in compared with hard stratum, the first variable diameters section and the hypomere of the second cement earth pile compared with Soft Soil Layer.
9. expansion type cement-soil composite pile in top as claimed in claim 8, it is characterised in that it is described be compared with hard stratum in it is close- Mixing more than one or both of the layer of sand of dense state, the cohesive soil of hard plastic-hardened condition, silt of dense state; The cohesive soil for moulding shape for soft modeling-stream compared with Soft Soil Layer.
CN201621323492.9U 2016-12-05 2016-12-05 A kind of top expansion type cement-soil composite pile Active CN206495202U (en)

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Application Number Priority Date Filing Date Title
CN201621323492.9U CN206495202U (en) 2016-12-05 2016-12-05 A kind of top expansion type cement-soil composite pile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201621323492.9U CN206495202U (en) 2016-12-05 2016-12-05 A kind of top expansion type cement-soil composite pile

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CN206495202U true CN206495202U (en) 2017-09-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106759301A (en) * 2016-12-05 2017-05-31 周同和 A kind of top expansion type cement-soil composite pile

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106759301A (en) * 2016-12-05 2017-05-31 周同和 A kind of top expansion type cement-soil composite pile

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