CN214530638U - Multi-shaft stirring stiffness composite pile - Google Patents
Multi-shaft stirring stiffness composite pile Download PDFInfo
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- CN214530638U CN214530638U CN202120258234.1U CN202120258234U CN214530638U CN 214530638 U CN214530638 U CN 214530638U CN 202120258234 U CN202120258234 U CN 202120258234U CN 214530638 U CN214530638 U CN 214530638U
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Abstract
The utility model discloses a multiaxis stirring strength nature composite pile is equipped with multiaxis soil cement mixing pile on the ground, is provided with the precast pile in the multiaxis soil cement mixing pile, and the top of multiaxis soil cement mixing pile is equipped with the bed course, and the bed course top is provided with the cushion cap, and the precast pile runs through the bed course and imbeds the cushion cap, is provided with the steel reinforcement cage between precast pile and the cushion cap. The multi-shaft cement soil mixing pile is used as a pile periphery transition flexible pile body of the precast pile, so that the pile side friction resistance of the precast pile is increased, the pile body material strength of the precast pile is fully exerted, and the soil squeezing effect on a site foundation is reduced; the single pile of the inner core precast pile has high bearing capacity and high construction efficiency, and overcomes the defect of low pile body strength of the traditional cement soil mixing pile. The utility model discloses a multiaxis stirring strength nature composite pile full play foundation soil, cement mixing pile and precast pile three's coordination combined action has that the atress performance is good, bear the weight of the characteristics that dynamic height, steady quality, efficiency of construction are high, and its economic benefits is good, and application prospect is extensive.
Description
Technical Field
The utility model belongs to the technical field of the building foundation is handled, concretely relates to multiaxis stirring strength nature composite pile.
Background
In recent years, more and more land is developed and the underground space of a building is more and more widely used. In the foundation engineering of multi-story and high-rise buildings and structures, a foundation treatment mode of a composite foundation or a pile foundation is generally adopted to improve the engineering characteristics of poor foundation soil so as to meet the requirements of bearing capacity and settlement required by design. When the precast pile is used as a friction pile of poor foundation soil, the bearing capacity of soil mass around the pile to the pile is low, most of the material strength of the pile body is not exerted, and the pile foundation is too large to bear load continuously due to overlarge settlement; when the soil layer is reinforced by the cement-soil mixing pile alone, the pile body of the cement-soil mixing pile has low strength, so that overlarge vertical load cannot be borne, the settlement deformation is large, and the application of the cement-soil mixing pile composite foundation is limited.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a multiaxis stirring strength nature composite pile to solve the problem that above-mentioned prior art exists.
In order to achieve the above object, the utility model provides a following scheme: the utility model provides a multiaxis stirring strength nature composite pile, including the ground, the ground is equipped with multiaxis soil cement mixing pile, be provided with the precast pile in the multiaxis soil cement mixing pile, the top of multiaxis soil cement mixing pile is provided with the bed course, the bed course top is provided with the cushion cap, the precast pile runs through bed course and embedding the cushion cap, the precast pile with be provided with steel reinforcement cage between the cushion cap.
Preferably, the top surface of the multi-shaft cement soil mixing pile is flush with the foundation, the cement mixing ratio of the multi-shaft cement soil mixing pile is 12% -18%, the diameter of the multi-shaft cement soil mixing pile is 650-850 mm, and the pile length of the multi-shaft cement soil mixing pile is 10-32 m.
Preferably, the precast pile is a prestressed concrete pile, the pile diameter of the precast pile is 400-600 mm, and the pile distance between any two precast piles is greater than 4 times of the pile diameter of the precast pile.
Preferably, the lower end of the reinforcement cage extends into a cavity at the top of the precast pile, and the top end of the reinforcement cage extends into the bearing platform; the reinforcement cage comprises 4-6 reinforcements, the diameter of the reinforcements is phi 14-phi 22, a cavity at the top of the precast pile is filled with concrete, and the filling height of the concrete is 1.5-2 m.
Preferably, the thickness of the cushion layer is 100mm to 200 mm.
Preferably, the length of the precast pile embedded into the bearing platform is not less than 100 mm.
The utility model discloses a following technological effect: the utility model provides a multiaxis stirring strength nature composite pile, multiaxis soil cement stirring stake as the stake of precast pile around the transition flexible pile body, increased the stake side frictional resistance of precast pile, full play precast pile body material intensity, reduce the crowded soil effect to the ground, cost performance is high, economic nature is good; the single pile of the inner core precast pile has high bearing capacity and high construction efficiency, and overcomes the defect of low pile body strength of the traditional cement soil mixing pile. The utility model discloses a multiaxis stirring strength nature composite pile full play foundation soil, cement mixing pile and precast pile three's coordination combined action has that the atress performance is good, bear the weight of the characteristics that dynamic height, steady quality, efficiency of construction are high, and its economic benefits is good, and application prospect is extensive.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a top view of the multi-shaft stirring stiff composite pile of the present invention;
fig. 2 is a schematic structural view of a multi-shaft stirring stiff composite pile of the present invention;
fig. 3 is a schematic structural diagram of embodiment 2 of the present invention;
fig. 4 is a schematic structural diagram of embodiment 3 of the present invention;
wherein, 1 is a bearing platform; 2 is a cushion layer; 3, a multi-shaft cement soil mixing pile; 4, precast pile; and 5, a reinforcement cage.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
Example 1
Referring to fig. 1-2, the utility model provides a multiaxis stirring strength nature composite pile, including the ground, the ground is equipped with multiaxis soil cement mixing pile 3, be provided with precast pile 4 in the multiaxis soil cement mixing pile 3, the top of multiaxis soil cement mixing pile 3 is provided with bed course 2, 2 tops of bed course are provided with cushion cap 1, precast pile 4 runs through bed course 2 and embedding cushion cap 1, precast pile 4 with be provided with steel reinforcement cage 5 between the cushion cap 1.
According to the further optimization scheme, the top surface of the multi-shaft cement-soil mixing pile 3 is flush with the foundation, the cement mixing ratio of the multi-shaft cement-soil mixing pile 3 is 14% -18%, the diameter of the multi-shaft cement-soil mixing pile 3 is 650-850 mm, the lap joint length of the multi-shaft cement-soil mixing pile 3 is not less than 250mm, and the pile length of the multi-shaft cement-soil mixing pile 3 is 10-32 m.
In a further optimized scheme, the precast piles 4 are prestressed concrete piles, the pile diameters of the precast piles 4 are 400-600 mm, and the pile distance between any two precast piles 4 is larger than 4 times of the pile diameter of the precast pile 4.
According to the further optimized scheme, the lower end of the reinforcement cage 5 extends into a cavity at the top of the precast pile 4, the top end of the reinforcement cage 5 extends into the bearing platform 1, and the reinforcement cage 5 combines the precast pile 4 and the bearing platform 1 together, so that the strength of the combination of the precast pile 4 and the bearing platform 1 is sufficient, and the precast pile is prevented from being broken; the reinforcement cage 5 comprises 4-6 reinforcements, the diameter of the reinforcements is phi 14-phi 22, a cavity at the top of the precast pile 4 is filled with concrete, and the filling height of the concrete is 1.5-2 m; and ensures the strength of the combination of the reinforcement cage 5 and the precast pile 4.
In a further optimization scheme, the thickness of the cushion layer 2 is 100mm-200mm, the edge of the cushion layer 2 exceeds the edge of the bearing platform 1 by about 100mm, the stress area of the cushion layer 2 is increased, and the pressure is reduced.
In a further optimized scheme, the length of the precast pile 4 embedded into the bearing platform 1 is not less than 100 mm.
The working principle is as follows: the utility model discloses a multi-shaft stirring stiffness composite pile, the construction method is as follows,
A. determining a pile foundation scheme according to factors such as building requirements, foundation conditions and the like, designing a multi-shaft stirring stiff composite pile and determining the size of a foundation;
B. leveling a construction site, detecting and cleaning barriers in a construction area, removing the above-ground and underground barriers, and rolling and tamping a surface soil body when the surface soil body is soft;
C. constructing multi-shaft cement soil mixing piles 3 at the pile arrangement positions by using a multi-shaft mixing pile machine;
D. after the construction of the multi-shaft cement soil mixing pile 3 is completed and the proper strength is achieved, a precast pile 4 is constructed at the end face position of the top end of the multi-shaft cement soil mixing pile 3, and the length of the prefabricated pile 4 after the construction is completed is larger than that of the multi-shaft cement soil mixing pile 3;
E. repeating the steps, and completing the construction of the multi-shaft cement soil mixing pile 3 and the precast pile 4 in the pile foundation in sequence;
F. constructing a cushion layer 2;
G. inserting a reinforcement cage 5 into a hollow part in a certain range at the top of the precast pile 4, and filling concrete;
H. and (3) constructing the bearing platform 1, wherein the edge size of the cushion layer 2 exceeds the bearing platform 1 by about 100mm, so that the stress area of the cushion layer 2 is increased, and the pressure intensity is reduced.
EXAMPLE 2
The difference from embodiment 1 is that in the above-described implementation step D, the length of the completed precast pile 4 is equal to the length of the multi-axial soil cement mixing pile 3.
Example 3
The difference from embodiment 1 is that in the above-described implementation step D, the length of the completed precast pile 4 is smaller than the length of the multi-axial soil cement mixing pile 3.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description of the present invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should also be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention, and all such modifications and improvements are intended to fall within the scope of the present invention as defined in the appended claims.
Claims (6)
1. The utility model provides a multiaxis stirring strength nature composite pile, includes the ground, its characterized in that: the ground is equipped with multiaxis soil cement mixing pile (3), be provided with precast pile (4) in multiaxis soil cement mixing pile (3), the top of multiaxis soil cement mixing pile (3) is provided with bed course (2), bed course (2) top is provided with cushion cap (1), precast pile (4) run through bed course (2) and embedding cushion cap (1), precast pile (4) with be provided with steel reinforcement cage (5) between cushion cap (1).
2. A multi-axial stirring stiff composite pile according to claim 1, characterised in that: the top surface of the multi-shaft cement-soil mixing pile (3) is flush with the foundation, the cement mixing ratio of the multi-shaft cement-soil mixing pile (3) is 12% -18%, the diameter d of the multi-shaft cement-soil mixing pile (3) is 650-850 mm, and the pile length of the multi-shaft cement-soil mixing pile (3) is 10-32 m.
3. A multi-axial stirring stiff composite pile according to claim 1, characterised in that: the precast pile (4) is a prestressed concrete pile, the pile diameter of the precast pile (4) is 400-600 mm, and the pile distance between any two precast piles (4) is larger than 4 times of the pile diameter of the precast pile (4).
4. A multi-axial stirring stiff composite pile according to claim 1, characterised in that: the lower end of the reinforcement cage (5) extends into a cavity at the top of the precast pile (4), and the top end of the reinforcement cage (5) extends into the bearing platform (1); the reinforcement cage (5) comprises 4-6 reinforcements, the diameter of the reinforcements is phi 14-phi 22, concrete is filled in a cavity at the top of the precast pile (4), and the filling height of the concrete is 1.5-2 m.
5. A multi-axial stirring stiff composite pile according to claim 1, characterised in that: the thickness of the cushion layer (2) is 100mm-200 mm.
6. A multi-axial stirring stiff composite pile according to claim 1, characterised in that: the length of the precast pile (4) embedded into the bearing platform (1) is not less than 100 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120258234.1U CN214530638U (en) | 2021-01-29 | 2021-01-29 | Multi-shaft stirring stiffness composite pile |
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| CN202120258234.1U CN214530638U (en) | 2021-01-29 | 2021-01-29 | Multi-shaft stirring stiffness composite pile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115506341A (en) * | 2022-10-28 | 2022-12-23 | 千易建设集团有限公司 | Cement-soil composite pile and construction equipment |
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- 2021-01-29 CN CN202120258234.1U patent/CN214530638U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115506341A (en) * | 2022-10-28 | 2022-12-23 | 千易建设集团有限公司 | Cement-soil composite pile and construction equipment |
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