CN108166482B - Precast concrete pile combination suitable for soft soil foundation and construction method thereof - Google Patents
Precast concrete pile combination suitable for soft soil foundation and construction method thereof Download PDFInfo
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- CN108166482B CN108166482B CN201711422525.4A CN201711422525A CN108166482B CN 108166482 B CN108166482 B CN 108166482B CN 201711422525 A CN201711422525 A CN 201711422525A CN 108166482 B CN108166482 B CN 108166482B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
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Abstract
The invention relates to a precast concrete pile combination suitable for a soft soil foundation and a construction method thereof. The invention overcomes the defect that the soil in the soft foundation can not provide enough lateral friction force for the central pile, and the soft foundation can also be reinforced by using the precast pile.
Description
Technical Field
The invention relates to the technical field of precast piles, in particular to a precast concrete pile combination suitable for a soft soil foundation and a construction method thereof.
Background
The precast pile of the reinforced concrete structure is often applied to foundation foundations, and under the condition of a soft soil foundation, the precast pile is driven into the ground, and the pile foundation is provided by the lateral friction force formed between the pile body and the soil to bear the load of a building. If soil density is too little in the soft soil foundation and needs to be driven into the precast pile that length is longer, even many precast piles are driven into the underground end to length trades the load, but the overlength pile foundation can cause the improvement of cost, needs to control the density of soil, so that the precast pile who forms possesses enough bearing load's ability.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a precast concrete pile combination suitable for a soft soil foundation and a construction method thereof, so that the defect that the soil in the soft foundation can not provide enough lateral friction force for a central pile is overcome, and the soft foundation can be reinforced by using the precast pile.
In order to solve the technical problems, the invention adopts a technical scheme that:
the utility model provides a precast concrete pile combination suitable for soft soil foundation, includes central stake and encircles a plurality of sheet piles around central stake, still is provided with a plurality of filled piles between central stake and the sheet pile, and a plurality of filled piles evenly arrange around central stake according to centrosymmetric structure.
Preferably, the radial dimension of the central pile is greater than the radial dimension of the filling pile.
Preferably, the central pile is in a circular truncated cone structure, and the central pile is vertically driven into the ground in a state that one end of the large head faces upwards.
Preferably, the central pile is of a hollow structure, and the hollow structure penetrates through the axis of the central pile.
Preferably, four sheet piles surround the center pile, the cross sections of the four sheet piles are of a right-angled edge structure, and a quadrilateral enclosure space is formed in an enclosing mode.
Preferably, twelve sheet piles surround the center pile, the twelve sheet piles surround to form a surrounding space with a hexagonal cross section, and every two sheet piles are spliced to form one side of the hexagon.
In order to solve the above technical problems, the present invention adopts another technical solution:
a construction method of a precast concrete pile combination suitable for a soft soil foundation comprises the following steps:
(1) determining the precise piling position of the central pile, then determining the soil density according to the soil condition of the land, and determining the cross section area of a space surrounded by a plurality of plate piles according to the soil density;
(2) determining the piling positions of the sheet piles by taking the position of the central pile as the center, driving the sheet piles one by one to form a surrounding space, and then driving the central pile;
(3) and determining whether to drive filling piles according to the bearing load of the test center pile, and determining the number of the filling piles to be driven until the load which can be borne by the center pile is greater than or equal to the preset load.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages:
1. according to the invention, the sheet piles are driven into the periphery of the central pile to surround the sheet piles to form a cylindrical space, and due to the soil pressure of the plate surface, very large pressure is required when the sheet piles move towards the inner side or the outer side of the surrounded space, so that the soil quantity and the soil density in the space surrounded by the sheet piles are locked by the sheet piles, the soil quantity and the soil density are basically not changed before the central pile is driven, after the central pile is driven, the soil density in the surrounded space is increased, and due to the existence of the sheet piles, the soil density in the surrounded space is continuously maintained in a constant state after the soil density is increased, so that the defect that the soil in a soft foundation can not provide enough lateral friction force for the central pile is overcome, and the soft foundation can also be reinforced by using the precast piles.
Drawings
FIG. 1 is a schematic structural diagram according to a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram according to a second embodiment of the present invention;
FIG. 3 is a schematic structural view of the present invention core pile;
wherein: 1. a central pile; 2. sheet piling; 3. and (6) filling the piles.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
The invention relates to a precast concrete pile combination suitable for a soft soil foundation, which comprises a central pile 1 and a plurality of sheet piles 2 surrounding the periphery of the central pile 1, wherein a plurality of filling piles 3 are arranged between the central pile 1 and the sheet piles 2, and the filling piles 3 are uniformly distributed around the central pile 1 according to a centrosymmetric structure.
The radial dimension of the central pile 1 is larger than the radial dimension of the filling piles 3.
As shown in fig. 3, the central pile 1 is a hollow structure, and a hollow axis line penetrating through the central pile 1, the central pile 1 is a circular truncated cone structure, the central pile 1 is vertically driven into the ground with a posture that the large end faces upwards, when the small end of the central pile 1 of the circular truncated cone structure is driven downwards, the difficulty of driving is low, the soil after being driven has pressure intensity vertically upwards to the central pile 1, and the applying area of the pressure intensity is equal to the end face area of the large end of the central pile 1.
Example one
As shown in fig. 1, in this embodiment, four sheet piles 2 surround a center pile 1, the cross sections of the four sheet piles 2 are in a rectangular edge structure and form a quadrangular enclosure space, the center pile 1 is disposed in the center of the enclosure space, and 4 filling piles 3 are uniformly arranged around the center pile 1.
Example two
As shown in fig. 2, in this embodiment, twelve sheet piles 2 surround a center pile 1, the twelve sheet piles 2 surround to form a surrounding space with a hexagonal cross section, each two sheet piles 2 are spliced to form one side of the hexagon, and the center pile 1 is disposed in the center of the surrounding space.
The invention relates to a construction method of a precast concrete pile combination suitable for a soft soil foundation, which comprises the following steps:
(1) determining the precise piling position of the central pile, then determining the soil density according to the soil condition of the land, and determining the cross section area of a space surrounded by a plurality of plate piles according to the soil density;
(2) determining the piling positions of the sheet piles by taking the position of the central pile as the center, driving the sheet piles one by one to form a surrounding space, and then driving the central pile;
(3) and determining whether to drive filling piles according to the bearing load of the test center pile, and determining the number of the filling piles to be driven until the load which can be borne by the center pile is greater than or equal to the preset load.
The present invention has been described in detail, and the embodiments are only used for understanding the method and the core idea of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the content of the present invention and to implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (5)
1. A construction method of a precast concrete pile combination suitable for a soft soil foundation is characterized by comprising the following steps: the precast concrete pile combination comprises a central pile and a plurality of sheet piles surrounding the periphery of the central pile, a plurality of filling piles are arranged between the central pile and the sheet piles, and the filling piles are uniformly distributed on the periphery of the central pile according to a centrosymmetric structure;
the central pile is in a round table structure, and is vertically driven into the ground in a posture that one end of a large head is upward;
the construction method comprises the following steps:
(1) determining the precise piling position of the central pile, then determining the soil density according to the soil condition of the land, and determining the cross section area of a space surrounded by a plurality of plate piles according to the soil density;
(2) determining the piling positions of the sheet piles by taking the position of the central pile as the center, driving the sheet piles one by one to form a surrounding space, and then driving the central pile;
(3) and determining whether to drive filling piles according to the bearing load of the test center pile, and determining the number of the filling piles to be driven until the load which can be borne by the center pile is greater than or equal to the preset load.
2. The construction method of the precast concrete pile combination suitable for the soft soil foundation according to claim 1, wherein: the radial dimension of the central pile is greater than the radial dimension of the filling pile.
3. The construction method of the precast concrete pile combination suitable for the soft soil foundation according to claim 1, wherein: the central pile is of a hollow structure and penetrates through the axis of the central pile in a hollow mode.
4. The construction method of the precast concrete pile combination suitable for the soft soil foundation according to claim 1, wherein: four sheet piles surround the periphery of the central pile, the cross sections of the four sheet piles are of right-angled edge structures, and a quadrilateral enclosure space is formed in an enclosure mode.
5. The construction method of the precast concrete pile combination suitable for the soft soil foundation according to claim 1, wherein: twelve sheet piles surround the center pile, the twelve sheet piles surround to form a surrounding space with a hexagonal cross section, and every two sheet piles are spliced to form one side of a hexagon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711422525.4A CN108166482B (en) | 2017-12-25 | 2017-12-25 | Precast concrete pile combination suitable for soft soil foundation and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711422525.4A CN108166482B (en) | 2017-12-25 | 2017-12-25 | Precast concrete pile combination suitable for soft soil foundation and construction method thereof |
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| Publication Number | Publication Date |
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| CN108166482A CN108166482A (en) | 2018-06-15 |
| CN108166482B true CN108166482B (en) | 2020-05-12 |
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| CN201711422525.4A Active CN108166482B (en) | 2017-12-25 | 2017-12-25 | Precast concrete pile combination suitable for soft soil foundation and construction method thereof |
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| CN113463457B (en) * | 2021-05-17 | 2022-06-14 | 衡阳公路桥梁建设有限公司 | Roadbed structure for penetrating through slurry section and construction method thereof |
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|---|---|---|---|---|
| CN204311434U (en) * | 2014-11-04 | 2015-05-06 | 宁波高新区围海工程技术开发有限公司 | A kind of precast concrete combination sheet pile |
| CN105239566A (en) * | 2015-08-12 | 2016-01-13 | 河海大学 | Multi-head stirring type large-diameter cast-in-situ pipe pile device and application thereof |
| CN205636772U (en) * | 2015-12-24 | 2016-10-12 | 重庆经贸职业学院 | PTCC stake weak soil reinforced structure |
| CN206457829U (en) * | 2017-02-05 | 2017-09-01 | 深圳市正兴基础建筑工程有限公司 | A kind of combination pilework of pattern foundation pit supporting structure |
| CN107190763A (en) * | 2017-06-14 | 2017-09-22 | 中铁第四勘察设计院集团有限公司 | By many paxilla Shu Hecheng class large diameter pile and its construction method |
-
2017
- 2017-12-25 CN CN201711422525.4A patent/CN108166482B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204311434U (en) * | 2014-11-04 | 2015-05-06 | 宁波高新区围海工程技术开发有限公司 | A kind of precast concrete combination sheet pile |
| CN105239566A (en) * | 2015-08-12 | 2016-01-13 | 河海大学 | Multi-head stirring type large-diameter cast-in-situ pipe pile device and application thereof |
| CN205636772U (en) * | 2015-12-24 | 2016-10-12 | 重庆经贸职业学院 | PTCC stake weak soil reinforced structure |
| CN206457829U (en) * | 2017-02-05 | 2017-09-01 | 深圳市正兴基础建筑工程有限公司 | A kind of combination pilework of pattern foundation pit supporting structure |
| CN107190763A (en) * | 2017-06-14 | 2017-09-22 | 中铁第四勘察设计院集团有限公司 | By many paxilla Shu Hecheng class large diameter pile and its construction method |
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| CN108166482A (en) | 2018-06-15 |
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Effective date of registration: 20230509 Address after: 210019 Yunlong mountain road, Jianye District, Nanjing, Jiangsu 79 Patentee after: China Nuclear Industry Huaxing Construction Co.,Ltd. Patentee after: CNNC Huaxing Mechanized Engineering Co.,Ltd. Address before: 210019 Yunlong mountain road, Jianye District, Nanjing, Jiangsu 79 Patentee before: China Nuclear Industry Huaxing Construction Co.,Ltd. |