CN211621562U

CN211621562U - Deeply-stirred conical stiffening core composite pile

Info

Publication number: CN211621562U
Application number: CN201922352333.1U
Authority: CN
Inventors: 吴可训; 程旻; 盛永锡; 丁文凯; 张倩; 葛立瑞; 蒋成良
Original assignee: Nanjing Haohua Architectural Technology Co ltd
Current assignee: Nanjing Haohua Architectural Technology Co ltd
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-10-02
Anticipated expiration: 2029-12-24

Abstract

The utility model discloses a stir toper strength core composite pile deeply, concretely relates to technical field, include the cushion cap and stir the stake deeply, the cushion cap is buried underground under the building foundation, the vertical tangent plane shape in upper end that stirs the stake deeply is isosceles trapezoid, the vertical tangent plane shape of lower extreme is the rectangle, stir the stake upper end inside deeply and be provided with toper core pile. The utility model discloses a toper core stake is obviously different with cross-section core stake at the horizontal resistance and the vertical resistance that length section produced, more can adapt to different soil environment, increases the bearing capacity, reduces the settlement volume, and contains core rate and price/performance ratio cross-section core stake also more superior.

Description

Deeply-stirred conical stiffening core composite pile

Technical Field

The utility model relates to a building foundation technical field, more specifically say, the utility model relates to a deeply stir toper strength core composite pile.

Background

The soft soil foundation has low compressive strength and large settlement deformation, so the pile foundation or the deep-stirring composite foundation is mostly adopted. The latter is used in large numbers in multi-storey and small high-rise buildings. In the deep layer stirring concrete, a prefabricated concrete small pile and a stiffening core composite pile of section steel are additionally arranged recently, and the method is gradually popularized and applied. However, from the analysis of a mechanical mechanism and a calculation model, the stiff core composite pile is inferior to a conical stiff core composite pile; and the core-containing rate and the cost performance are superior to those of the conical core composite pile.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a deeply stir toper strength core composite pile in order to solve above-mentioned problem, the utility model discloses a toper core stake is obviously different with uniform cross section core stake at the horizontal resistance and the vertical resistance that length section produced, more can adapt to different soil environment, increases the bearing capacity, reduces the settlement volume, and contains core rate and price/performance ratio also more superior cross section core stake.

In order to achieve the above object, the utility model provides a following technical scheme: the pile foundation deep stirring device comprises a bearing platform and deep stirring piles, wherein the bearing platform is buried under a building foundation, the vertical section of the upper end of each deep stirring pile is isosceles trapezoid, the vertical section of the lower end of each deep stirring pile is rectangular, and a conical core pile is arranged inside the upper end of each deep stirring pile.

In a preferred embodiment, the conical core pile has a cone angle of 5 ° to 9 °.

In a preferred embodiment, the thickness of the platform is 100 mm.

In a preferred embodiment, the upper top surface and the lower top surface of the deep stirring pile are both rectangular in shape.

In a preferred embodiment, the upper top surface and the lower top surface of the deep stirring pile are both circular in shape.

The utility model discloses a technological effect and advantage:

1. the horizontal resistance and the vertical resistance generated by the tapered core pile and the traditional equal-section core pile in the length section are obviously different, so that the tapered core pile can be more suitable for different soil environments, the bearing capacity is increased, and the settlement is reduced; according to the depth influenced by the compression layer under the foundation, the cone stiff composite core pile has more compaction and compaction effects on the soil layer, improves the bearing capacity, reduces the settlement amount, and is superior to the constant-section stiff core composite pile in the working mechanism.

2. The utility model discloses a stir toper strength core composite pile deeply is cone strength core composite pile under equivalent core pile, and more the uniform cross section core pile is more superior.

3. The deep-stirring conical strength core composite pile of the utility model can improve the bearing capacity of the pile body by 10-15% and the settling volume is less by 15-20%.

Drawings

Figure 1 is the utility model discloses a strength core stirs compound pile anchor connection plan deeply.

Fig. 2 is a schematic view of the rectangular cross-section tapered core pile of the present invention.

Fig. 3 is a schematic view of the conical core pile with a circular cross section of the present invention.

The reference signs are: 1 bearing platform, 2 conical core piles, 3 deep mixing piles and 4 building base.

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.

Example 1:

1. the utility model provides a deeply stir toper strength core composite pile, including cushion cap 1 and deeply stir stake 3, cushion cap 1 buries underground under building foundation 4, the thickness of cushion cap 1 is 100mm, the vertical tangent plane shape of the upper end of deeply stirring stake 3 is isosceles trapezoid, the vertical tangent plane shape of lower extreme is the rectangle, deeply stir 3 upper end inside of stake and be provided with toper core stake 2, the cone angle of toper core stake 2 is 5, the top surface and the lower top surface shape of deeply stirring stake 3 are the rectangle, deeply stir stake cross-section and contain core rate m and refer to concrete core stake sectional area A1 and cement and stir the specific value of sectional area A, namely m is A1/A, and the cross-section of toper deeply stirring stake contains core rate m and is along with length change, decide with middle part average diameter or length of side, its m is 0.25 ~ 0.30, more equal cross-section core stake is superior.

Example 2:

2. the utility model provides a deeply stir toper strength core composite pile, including cushion cap 1 and deeply stir stake 3, cushion cap 1 buries underground under building foundation 4, the thickness of cushion cap 1 is 100mm, the vertical tangent plane shape of the upper end of deeply stirring stake 3 is isosceles trapezoid, the vertical tangent plane shape of lower extreme is the rectangle, deeply stir 3 upper end inside of stake and be provided with toper core stake 2, the cone angle of toper core stake 2 is 9, the top surface and the lower top surface shape of deeply stirring stake 3 are circular, deeply stir stake cross-section and contain core rate m and refer to concrete core stake sectional area A1 and cement and stir the specific value of sectional area A, namely m is A1/A, and the cross-section of toper deeply stirring stake contains core rate m and is along with length change, decide with middle part average diameter or length, its m is 0.25 ~ 0.30, more superior than equal cross-section core stake.

The utility model discloses a deep mixing conical strength core composite pile construction method, including following steps:

3. according to the fluctuation change of a field, uneven hardness of soil layer distribution and the difference of physical and mechanical performance indexes, exploratory test piles are required to be made before large-area operation; and before foundation construction, performing acceptance engineering pile test according to the pile foundation detection standard. Soil raising and pile inclination can occur when the pile spacing is too small; when the load capacity is too large, the bearing capacity is reduced, and the settlement is increased. The proper distance is set to be appropriate and can be determined by the influence analysis of the soil-squeezing effect.

4. The conical concrete core pile required by the foundation plane layout drawing is firstly manufactured and transported to a construction site for standby.

5. And (3) preparing the single-shaft deep mixer, the mortar mixer and the top-pressing pile machine, and matching with continuous operation.

6. Before a foundation or a bearing platform is made, the bearing capacity and the integrity of a pile body of the combined pile are detected and identified.

7. And (3) centering and vertically pressing the conical core pile in the initial setting time after the deep-stirring cement-soil pile is completed. The length of the conical core pile takes the depth factor of a soil layer compression layer of a foundation category into consideration. The depth and the cone angle of the soil layer compression layer are controlled by double control.

8. The core content m of the section of the deep mixing pile is the ratio of the section area A1 of the concrete core pile to the section area A of the cement mixing pile, namely m is A1/A, the core content m of the section of the conical deep mixing pile is changed along with the length and is determined by the average diameter of the middle part or the side length, and m is 0.25-0.30, which is more excellent than the core pile with the equal section.

7. The top elevation of the composite pile is controlled according to the requirement of a basic diagram, and secondary breaking and dismantling treatment is not allowed.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are referred to, and other structures can refer to the common design, and under the condition of no conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

and finally: the above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a stir toper strength core composite pile deeply, includes cushion cap (1) and stirs stake (3) deeply, cushion cap (1) is buried underground under building foundation (4), its characterized in that: the vertical section of the upper end of the deep stirring pile (3) is isosceles trapezoid, the vertical section of the lower end of the deep stirring pile (3) is rectangular, and a conical core pile (2) is arranged inside the upper end of the deep stirring pile (3).

2. The deep-stirring conical stiff core composite pile according to claim 1, characterized in that: the taper angle of the conical core pile (2) is 5-9 degrees.

3. The deep-stirring conical stiff core composite pile according to claim 1, characterized in that: the thickness of the bearing platform (1) is 100 mm.

4. The deep-stirring conical stiff core composite pile according to claim 1, characterized in that: the upper top surface and the lower top surface of the deep stirring pile (3) are both rectangular.

5. The deep-stirring conical stiff core composite pile according to claim 1, characterized in that: the upper top surface and the lower top surface of the deep stirring pile (3) are both circular.