CN204151810U - A kind of composite foundation - Google Patents
A kind of composite foundation Download PDFInfo
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- CN204151810U CN204151810U CN201420475863.XU CN201420475863U CN204151810U CN 204151810 U CN204151810 U CN 204151810U CN 201420475863 U CN201420475863 U CN 201420475863U CN 204151810 U CN204151810 U CN 204151810U
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- pile
- pressure rotary
- jet grouting
- rotary jet
- composite foundation
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Abstract
This application discloses a kind of composite foundation, comprise pile body and the mattress layer being layed in pile body top, pile body comprises high-pressure rotary jet grouting pile and the pile for prestressed pipe through high-pressure rotary jet grouting pile inside, and the length of pile for prestressed pipe is greater than the length of high-pressure rotary jet grouting pile.In this composite foundation, make full use of high-pressure rotary jet grouting pile solidification and displacement natural ground, utilize the diameter of the compacted expansion high-pressure rotary jet grouting pile of pile for prestressed pipe, strengthen the collateral resistance of high-pressure rotary jet grouting pile and its Pile side soil body, simultaneously, pile for prestressed pipe has increased substantially the bearing capacity of high-pressure rotary jet grouting pile pile body intensity and composite foundation, also strengthens the foundation soil of different depth.Do not need as prior art, by increasing the quantity of high-pressure rotary jet grouting pile and reducing the requirement that pile spacing reaches high-bearing capacity, therefore, meet consolidated subsoil, reducing foundation settlement and preventing on the basis of requirement of differential settlement, realize the object not increasing construction cost and difficulty of construction.
Description
Technical field
The utility model relates to technical field of building construction, particularly a kind of composite foundation.
Background technology
In the realm of building construction, extensively adopt rotary churning pile to carry out consolidation process to weak natural ground at present, to solve the problem that natural foundation bearing capacity is not enough or deflection is excessive, the adverse effect reducing foundation deformation and prevent uneven settlement of foundation from bringing the engineering later stage.
But when the bearing capacity of designing requirement is higher and the distribution of place weak foundation soil is very uneven, for effectively reinforcing ground and reducing foundation deformation and prevent ground from occurring differential settlement, and adopt single rotary churning pile process to be difficult to reach designing requirement, if merely by increasing stake number, to increase stake long or reduce stake footpath and improve Bearing Capacity of Composite Foundation, while improving DeGrain, cause the significantly raising of construction cost.
In sum, how meeting ground stabilization and reducing foundation deformation and prevent from, on the basis of requirement of differential settlement, not increasing construction cost and difficulty of construction, those skilled in the art's problem demanding prompt solution is become.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of composite foundation, to meet ground stabilization and reducing foundation deformation and prevent from, on the basis of requirement of differential settlement, not increasing construction cost and difficulty of construction.
For achieving the above object, the utility model provides following technical scheme:
A kind of composite foundation, comprise pile body and the mattress layer being layed in pile body top, described pile body comprises high-pressure rotary jet grouting pile and the pile for prestressed pipe through described high-pressure rotary jet grouting pile inside, and the length of described pile for prestressed pipe is greater than the length of described high-pressure rotary jet grouting pile.
Preferably, in above-mentioned composite foundation, described mattress layer is broken stone cushion layer.
Preferably, in above-mentioned composite foundation, the thickness of described broken stone cushion layer is 20cm ~ 30cm.
Preferably, in above-mentioned composite foundation, described pile body is triangular array, rectangular array or quincunx array arrangement form.
Compared with prior art, the beneficial effects of the utility model are:
In the composite foundation that the utility model provides, pile body is made up of high-pressure rotary jet grouting pile and the pile for prestressed pipe be applied in wherein, make full use of high-pressure rotary jet grouting pile solidification and displacement natural ground, utilize the diameter of the compacted expansion high-pressure rotary jet grouting pile of pile for prestressed pipe, strengthen the collateral resistance of high-pressure rotary jet grouting pile and Pile side soil body, simultaneously, pile for prestressed pipe has increased substantially the bearing capacity of high-pressure rotary jet grouting pile intensity and composite foundation, the length of pile for prestressed pipe is greater than the length of high-pressure rotary jet grouting pile, realizes the object of reinforcing different depth foundation soil.Do not need as prior art, by increase high-pressure rotary jet grouting pile quantity, to increase stake long and reduce pile spacing and reach high-bearing capacity and reduce foundation deformation and prevent differential settlement, therefore, meeting consolidated subsoil and reducing foundation deformation and prevent from, on the basis of requirement of differential settlement, not increasing construction cost and difficulty of construction.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or scheme of the prior art, be briefly described to describing the required accompanying drawing used in embodiment or prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those skilled in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of a kind of composite foundation that Fig. 1 provides for the utility model;
Fig. 2 is the sectional view in the A-A cross section of Fig. 1.
In above-mentioned Fig. 1 and Fig. 2, mattress layer 1, pile body 2, high-pressure rotary jet grouting pile 21, pile for prestressed pipe 22.
Detailed description of the invention
Core of the present utility model there is provided a kind of composite foundation, is meeting ground stabilization and is reducing foundation deformation and prevent from, on the basis of differential settlement requirement, not increasing construction cost and difficulty of construction.
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only a part of embodiment of the present utility model, instead of whole embodiments.Based on embodiment of the present utility model, other embodiments all that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belong to the scope of the utility model protection.
Please refer to Fig. 1 and Fig. 2, the structural representation of a kind of composite foundation that Fig. 1 provides for the utility model; Fig. 2 is the sectional view in the A-A cross section of Fig. 1.
The utility model embodiment provides a kind of composite foundation, comprise pile body 2 and the mattress layer 1 being laid on pile body 2 top, it is the soil body between pile body 2, wherein, pile body 2 comprises high-pressure rotary jet grouting pile 21 and pile for prestressed pipe 22, and pile for prestressed pipe 22 is along the axis direction of high-pressure rotary jet grouting pile 21 through the inside of high-pressure rotary jet grouting pile 21.
In above-mentioned composite foundation, pile body 2 is made up of high-pressure rotary jet grouting pile 21 and the pile for prestressed pipe 22 be applied in wherein, make full use of high-pressure rotary jet grouting pile 21 solidify and replace natural ground, utilize the diameter of the compacted expansion high-pressure rotary jet grouting pile 21 of pile for prestressed pipe 22, strengthen the collateral resistance of high-pressure rotary jet grouting pile 21 and Pile side soil body, simultaneously, pile for prestressed pipe 22 has increased substantially the bearing capacity of high-pressure rotary jet grouting pile 21 intensity and composite foundation, the length of pile for prestressed pipe 22 is greater than the length of high-pressure rotary jet grouting pile 21, can reinforce different depth soft stratum.Do not need as prior art, by increase high-pressure rotary jet grouting pile 21 quantity, to increase stake long and reduce pile spacing and make composite foundation reach high-bearing capacity and reduce foundation deformation and prevent differential settlement, therefore, meeting consolidated subsoil and reducing foundation deformation and prevent from, on the basis of differential settlement requirement, not increasing construction cost and difficulty of construction.
Further optimization pile body, the length of the pile for prestressed pipe 22 in the present embodiment is greater than the length of high-pressure rotary jet grouting pile 21, pile for prestressed pipe 22 is goed deep in the soil body more, thus improves the treating depth of pile body 2, makes the non-deformability of composite foundation stronger.Certainly, according to the strata condition design pile for prestressed pipe 22 of reality and the length of high-pressure rotary jet grouting pile 21, both length can also be equal.
As optimization, the mattress layer 1 of the composite foundation in the present embodiment is broken stone cushion layer, and except adopting broken stone cushion layer, mattress layer 1 can also by dirt, sandstone.The composition such as slag, plain concrete.
Further, the thickness of the broken stone cushion layer in the present embodiment is 20cm ~ 30cm.Broken stone cushion layer is too thick, and can not play the advantage after pile body 2 combination, too thin, bearing capacity too concentrates on pile body 2, therefore, adopts size of the present utility model that broken stone cushion layer can be made to play and acts on preferably, oil and pile is worked in coordination with and bears load.
Be optimized the arrangement of pile body 2, the pile body 2 in the present embodiment adopts the arrangement forms such as triangular array, rectangular array or quincunx array, as long as can play the effect of consolidated subsoil, the place situation according to reality is arranged, and is not specifically limited at this.
The utility model embodiment provides a kind of construction method of composite foundation, for building the composite foundation described by above embodiment and technical scheme, comprises the following steps:
Step S1, according to the stake position designed by playpipe injection soil, nozzle reaches design elevation.
Step S2, speed, pressure and concentration of slurry by design code carry out jet groutinl, after jet groutinl parameter reaches setting, promote injector head, from top to bottom rotary-jet slip casting, form high-pressure rotary jet grouting pile 21.
Step S3, churning complete proposition shower nozzle, according to designing requirement, before high-pressure rotary jet grouting pile 21 starts condensation, squeeze into or be pressed in high-pressure rotary jet grouting pile 21, to design elevation by pile for prestressed pipe 22 along the axis direction of high-pressure rotary jet grouting pile 21; The length of pile for prestressed pipe 22 is greater than the length of high-pressure rotary jet grouting pile 21, completes pile body 2.
Step S4, according to designing requirement and in conjunction with construction plant formation condition, lay the thick broken stone cushion layer of 20 ~ 30cm at pile body 2 top, realize working in coordination with by pile body 2 and inter-pile soil the object bearing upper load.
In this manual, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (4)
1. a composite foundation, comprise pile body (2) and be layed in the mattress layer (1) at described pile body (2) top, it is characterized in that, described pile body (2) comprises high-pressure rotary jet grouting pile (21) and the pile for prestressed pipe (22) through described high-pressure rotary jet grouting pile (21) inside, and the length of described pile for prestressed pipe (22) is greater than the length of described high-pressure rotary jet grouting pile (21).
2. composite foundation according to claim 1, is characterized in that, described mattress layer (1) is broken stone cushion layer.
3. composite foundation according to claim 2, is characterized in that, the thickness of described broken stone cushion layer is 20cm ~ 30cm.
4. the composite foundation according to any one of claims 1 to 3, is characterized in that, described pile body (2) is triangular array, rectangular array or quincunx array arrangement form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420475863.XU CN204151810U (en) | 2014-08-22 | 2014-08-22 | A kind of composite foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420475863.XU CN204151810U (en) | 2014-08-22 | 2014-08-22 | A kind of composite foundation |
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| Publication Number | Publication Date |
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| CN204151810U true CN204151810U (en) | 2015-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420475863.XU Active CN204151810U (en) | 2014-08-22 | 2014-08-22 | A kind of composite foundation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153388A (en) * | 2014-08-22 | 2014-11-19 | 中国建筑西南勘察设计研究院有限公司 | Composite foundation and construction method thereof |
-
2014
- 2014-08-22 CN CN201420475863.XU patent/CN204151810U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153388A (en) * | 2014-08-22 | 2014-11-19 | 中国建筑西南勘察设计研究院有限公司 | Composite foundation and construction method thereof |
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