CN116497797A - Clutch type support pile and construction method - Google Patents
Clutch type support pile and construction method Download PDFInfo
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- CN116497797A CN116497797A CN202310236489.1A CN202310236489A CN116497797A CN 116497797 A CN116497797 A CN 116497797A CN 202310236489 A CN202310236489 A CN 202310236489A CN 116497797 A CN116497797 A CN 116497797A
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- 238000010276 construction Methods 0.000 title claims abstract description 91
- 210000001503 joint Anatomy 0.000 claims abstract description 63
- 239000002689 soil Substances 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 20
- 239000011435 rock Substances 0.000 claims abstract description 12
- 238000002513 implantation Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 230000002787 reinforcement Effects 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 4
- 241000276425 Xiphophorus maculatus Species 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 7
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- 238000005452 bending Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
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- 238000013461 design Methods 0.000 description 3
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
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- 230000002411 adverse Effects 0.000 description 1
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Classifications
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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
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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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
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
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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
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
- E02D5/08—Locking forms; Edge joints; Pile crossings; Branch pieces
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
Abstract
The application provides a clutch type support pile and a construction method, which relate to the field of foundation pit engineering of geotechnical engineering and cofferdam engineering of hydraulic engineering, and comprise a first pile body and a second pile body; the first pile body is of a plate-shaped structure so as to realize the construction of a supporting surface by implanting a rock and soil layer along the corresponding direction, and joint parts are arranged at two ends of the first pile body along the arrangement direction so as to realize the connection function; the second pile body is adjacent to one side of the first pile body along the implantation direction of the first pile body so as to improve the supporting rigidity, the first pile body is provided with a first butt joint part at the adjacent position, and the second pile body is provided with a second butt joint part so as to realize mutual reliable connection. The clutch type support pile and the construction method can improve the construction efficiency and the structural rigidity of the support pile, enhance the expandability, reduce the construction operation difficulty, reduce the influence on the surrounding environment in the construction process and improve the economic benefit.
Description
Technical Field
The application relates to the field of foundation pit engineering of geotechnical engineering and cofferdam engineering of hydraulic engineering, in particular to a clutch type support pile and a construction method.
Background
The foundation pit engineering and the cofferdam engineering are widely applied to the fields of urban construction engineering, subway engineering, underground comprehensive pipe gallery engineering and the like. At present, the domestic deep foundation pit enclosure water stop structure has the forms of underground continuous wall, bored pile, SMW construction pile, TRD construction pile, PC construction pile, HC construction pile, HU construction pile, H+HAT construction pile and the like.
The most commonly used structures in deep foundation pit engineering construction are underground diaphragm walls, bored piles, SMW (soil mixing wall) construction piles, TRD (concrete mixing wall) construction piles, PC (concrete) construction piles and HC construction piles, a large amount of slurry exists in the construction process of the underground diaphragm walls and the bored piles, the influence on the surrounding environment is large, and steel bars and concrete are used in a large amount, so that the construction cost is high and is not in accordance with the development concept of 'carbon reaching peak and carbon neutralization' which are greatly promoted by the nation; the construction influence of the SMW and TRD construction methods is small, but because the construction quality of the waterproof curtain of the SMW and TRD construction methods is difficult to control, the strength of cement soil is low, and accidents are often caused by leakage. The HU construction method pile and the H+HAT construction method pile are combined by steel bars welded on the Larson pile and H-shaped steel and Larson steel sheet piles to form a separated combined pile, the water is better, but the integrity is relatively poor, and the rigidity and the stress performance are general; the PC construction method pile and the HC construction method pile adopt steel pipe pile or H-shaped steel and Lassen steel sheet pile combination, the overall rigidity is high, the water stopping and the stress are good, in order to ensure the small tongue-and-groove connection, the steel pipe pile or the H-shaped steel must be sequentially connected and driven along the same arrangement, and then the Lassen pile is driven, but because the rigidity of the combined steel pipe pile or H-shaped steel is larger, the construction difficulty is high when the steel pipe pile, the H-shaped steel and the Lassen pile are driven in the early stage, the efficiency is extremely low, and the design elevation cannot be driven in the extreme case. Later-stage recovery PC construction method pile needs to retrieve the Lasen pile earlier, retrieve the steel-pipe pile again, in order to ensure the stagnant water effect, the hasp of welding on the steel pipe often leads to long setting, because hasp length is longer, and Lasen pile and adjacent steel-pipe pile all adopt little tongue-and-groove to be connected, the recovery degree of difficulty is great, lasen pile and steel-pipe pile locking state still appear in extreme case, adopt great power vibration equipment can't all retrieve, long-time vibration often leads to adverse environmental impact, and influence the time limit for a project, lead to the very big increase of expense, thereby greatly restrict popularization and further application of this construction method.
In summary, although the existing pile type and construction method adopted in deep foundation pit engineering can obtain ideal expected effects under proper engineering environment conditions, there are places to be improved in comprehensive consideration of engineering cost, pile forming performance, construction difficulty and the like. In view of this, the present deep foundation pit construction field needs to develop a support pile structure with strong structural expansibility, high construction efficiency, large structural rigidity, small deformation, good water stopping effect, reliable engineering quality and good economic benefit, so as to improve pile forming quality and usability of the support pile, shorten construction period, and reduce influence on surrounding environment in the construction process.
Disclosure of Invention
In order to solve the problems that the existing deep foundation pit support structure is low in construction efficiency, high in difficulty, insufficient in expandability of pile body structure, difficult to guarantee engineering quality and easy to influence construction environment, the application provides a clutch type support pile and a construction method, which can improve construction efficiency and structural rigidity of the support pile, reduce construction operation difficulty, reduce influence on surrounding environment in a construction process and improve economic benefit.
The technical scheme adopted for solving the technical problems is as follows: the clutch type support pile is characterized by comprising a first pile body and a second pile body.
The first pile body is of a plate-shaped structure so as to realize the construction of a supporting surface by implanting a rock and soil layer along the corresponding direction, and the two ends of the first pile body along the arrangement direction are provided with joint parts so as to realize the connection function.
The second pile body is adjacent to one side of the first pile body along the implantation direction of the first pile body so as to improve the supporting rigidity, the first pile body is provided with a first butt joint part at the adjacent position, and the second pile body is provided with a second butt joint part so as to realize mutual reliable connection.
In a specific embodiment, the second pile body is provided with at least two second butt joint parts at different positions of the pile body to realize the connection function at corresponding positions, so that the combined connection capability of the clutch type support pile is expanded.
In a specific embodiment, the clutch type supporting pile is provided with at least two rows of first pile bodies along the arrangement direction, and the second pile bodies are adjacent between the two rows of first pile bodies and are respectively connected with the first butt joint parts of the first pile bodies through the second butt joint parts at corresponding positions.
In a specific embodiment, the first butt joint part is arranged along the length direction of the first pile body, and the second butt joint part is arranged along the length direction of the second pile body, so that the connection stress formed by the first pile body and the second pile body along the length direction of the pile body is reliable, and the integrally-acting support pile is constructed.
In a specific embodiment, the first butt joint portion and the second butt joint portion respectively comprise a convex body structure and a concave body structure which is matched with the convex body structure in shape and is in scarf joint with the convex body structure, so that the first pile body and the second pile body can be reliably connected with each other through the first butt joint portion and the second butt joint portion respectively.
In a specific embodiment, the first pile body and the second pile body are respectively provided with grouting pipes along the implantation direction so as to realize grouting or water injection operation on the rock soil layer at the position of the pile body during construction.
In a specific embodiment, the second pile bodies are arranged at intervals on one side of the first pile bodies along the arrangement direction.
In a specific embodiment, the clutch type support pile is provided with at least a third pile body on one side of the first pile body so as to further improve the support rigidity; the third pile body is provided with a grouting pipe along the implantation direction so as to realize grouting or water injection operation on the corresponding pile body position during construction.
In a specific embodiment, the third pile body and the second pile body are arranged at intervals on the same side of the first pile body.
In a specific embodiment, the construction method of the clutch type support pile comprises the following steps:
s1, on-site measurement lofting, and constructing and implanting a first pile body;
s2, embedding a second butt joint part of the second pile body and a first butt joint part of the first pile body at the corresponding position, and constructing and implanting the second pile body;
s3, after the clutch type support pile is used for completing the support function, the second pile body is recovered, and grouting reinforcement is carried out on the rock-soil layer at the position of the pile body through a grouting pipe;
s4, recovering the first pile body, and grouting and reinforcing the rock and soil layer at the position of the pile body through a grouting pipe.
The application has the advantages that:
1. the clutch type support pile has the advantages that through the fact that the first pile body realizing the support water stopping function and the second pile body realizing the support function are respectively distributed in different rows, the problems that construction efficiency is low when the first pile body and the second pile body are sleeved and beaten in the same row by the traditional method, recovery is difficult and the like caused by locking of connecting parts due to construction when the first pile body and the second pile body are implanted into the pile body are avoided, the pile bodies with different structures and functions are independent and connected with each other, the use requirement is met, and meanwhile, the construction efficiency and engineering quality are improved.
2. The connection mode and structure of the clutch type support pile enable the butt joint structure of the first pile body to be arranged on only one side of the second pile body when the support function is built, compared with the method of arranging the first pile body in the same row in the traditional method, the arrangement of the butt joint structure of the second pile body is reduced, the structure of relevant parts of the support pile is simplified, and cost is reduced.
3. The connection structure of the clutch type support pile can further expand the specific function of the support pile, the support rigidity of the support pile is further improved by additionally arranging the third pile body, and the double waterproof function with better effect is constructed by additionally arranging the first pile body with the support water stopping function, so that the modularization and expansibility of the clutch type support pile are enhanced.
4. The connection mode and the structure of the corresponding pile body of the clutch type support pile enable each pile body to be constructed and recovered respectively, avoid mutual influence, further guarantee the overall functionality of the support pile structure, improve the independence of the corresponding pile body, and improve the construction efficiency.
5. The clutch type support pile is characterized in that the second pile body is arranged on one side of the first pile body in a non-same-row mode, compared with a traditional same-row arrangement method, the clutch type support pile is higher in section moment of inertia and bending-resistant section coefficient, and therefore overall structural rigidity is improved, and foundation pit deformation is greatly reduced.
6. The clutch type support pile is characterized in that the grouting pipe is arranged on the corresponding pile body structure, so that grouting or water injection operation is carried out on the rock soil layer at the pile body position during implantation and recovery, the influence on the construction environment is further reduced, and the engineering construction benefit and efficiency are improved.
Drawings
FIG. 1 is a schematic view of a clutch type support pile formed by a first pile body and a second pile body;
FIG. 2 is a schematic view of a clutch type support pile formed by a first pile body and a second pile body;
FIG. 3 is a schematic view of a first pile body of a clutch type supporting pile according to the present application on a soil facing surface;
FIG. 4 is a schematic view of a clutch type support pile according to the present application, wherein a first pile body is located on a back soil surface;
FIG. 5 is a schematic view of a clutch type support pile according to the present application, wherein second butt joint parts are provided at two sides of a second pile body;
FIG. 6 is a schematic view of two rows of first pile bodies symmetrically arranged on two sides of a second pile body;
FIG. 7 is a schematic view of a clutch type support pile according to the present application, wherein the clutch type support pile comprises a first pile body, a second pile body and a third pile body;
FIG. 8 is a schematic view of two rows of first pile bodies symmetrically arranged on two sides of a second pile body and a third pile body of a clutch type supporting pile;
FIG. 9 is a schematic view of a construction step of a clutch type support pile formed by a first pile body and a second pile body;
FIG. 10 is a schematic view of a construction step of a clutch type support pile formed by a first pile body, a second pile body and a third pile body;
FIG. 11 is a schematic illustration of a clutch type support pile with a second pile spacing on one side of a first pile;
FIG. 12 is a schematic view of a clutch type support pile according to the present application, illustrating a second pile spacing arrangement between two rows of first piles;
fig. 13 is a schematic diagram of a clutch type supporting pile with a second pile body and a third pile body arranged at intervals on one side of the first pile body;
FIG. 14 is a schematic view of a clutch type support pile according to the present invention, wherein the second pile and the third pile are arranged at intervals between two rows of first piles;
FIG. 15 is a schematic view of a clutch support pile according to the present invention, wherein the first pile body is a hat-shaped steel sheet pile and the second pile body is disposed on the concave side;
FIG. 16 is a schematic view of a clutch type support pile according to the present invention, wherein a first pile body is a hat-shaped steel sheet pile and is symmetrically disposed at two sides of a second pile body at a concave side;
FIG. 17 is a schematic view of a clutch type support pile according to the present invention, wherein a first pile body is a hat-shaped steel sheet pile, and a second pile body and a third pile body are arranged on a concave side;
FIG. 18 is a schematic view of a clutch type support pile according to the present invention, wherein the first pile body is a hat-shaped steel sheet pile and is symmetrically disposed at two sides of the second pile body and the third pile body at the concave side;
FIG. 19 is a schematic view of a clutch support pile according to the present invention, wherein the first pile body is a hat-shaped steel sheet pile and the second pile body is disposed on the convex side;
FIG. 20 is a schematic view of a clutch type support pile according to the present invention, wherein a first pile body is a hat-shaped steel sheet pile and is symmetrically disposed on both sides of a second pile body on a convex side;
FIG. 21 is a schematic view of a clutch type support pile according to the present invention, wherein a first pile body is a hat-shaped steel sheet pile, and a second pile body and a third pile body are arranged on a convex side;
FIG. 22 is a schematic view of a clutch type support pile according to the present invention, wherein the first pile body is a hat-shaped steel sheet pile and is symmetrically disposed on both sides of the second pile body and the third pile body on the convex side;
fig. 23 is a comparative schematic diagram of a method of setting a clutch support pile according to the present application.
The main reference numerals illustrate:
1-a first pile body; 2-a second pile body; 3-a third pile body; 4-joint; 5-a first docking portion; 6-a second butt joint part; 71-a first pile grouting pipe; 72-a second pile grouting pipe; 73-a third pile grouting pipe; 8-grouting reinforcement positions of the first pile body; 9-grouting reinforcement positions of the second pile body; and 10-grouting reinforcement positions of the third pile body.
Detailed Description
The embodiment of the application solves the problems that the existing deep foundation pit support structure is low in construction efficiency, high in difficulty, insufficient in expandability of a pile body structure, difficult to guarantee engineering quality and easy to influence construction environment by providing the clutch type support pile and the construction method, and the overall thinking is as follows:
referring to fig. 1 and 2, the present application provides a clutch type support pile, which includes a first pile body 1 and a second pile body 2. The first pile body 1 is of a plate-shaped structure so as to realize the construction of a supporting surface by implanting a rock and soil layer along the corresponding direction, and the two ends of the first pile body 1 along the arrangement direction are provided with joint parts 4 so as to realize the connection function; the second pile body 2 is adjacent to one side of the first pile body 1 along the implantation direction of the first pile body 1 to improve the supporting rigidity, the first pile body 1 is provided with a first butt joint part 5 at the adjacent position, and the second pile body 2 is provided with a second butt joint part 6 to realize mutual reliable connection. The clutch type support pile correspondingly forms a connection mode and structure of the pile body, so that each pile body can be respectively constructed and recycled, and mutual influence is avoided, thereby not only guaranteeing the overall functionality of the support pile structure, but also improving the independence of the corresponding pile body and improving the construction efficiency; in addition, by arranging the second pile body 2 on one side of the first pile body 1, compared with the traditional in-line arrangement method, the clutch type support pile has higher section moment of inertia and bending resistance section coefficient, thereby improving the rigidity of the whole structure and greatly reducing the deformation of the foundation pit.
Referring to fig. 1 and 2, the first pile body 1 may be a sheet pile structure to construct a supporting surface, the second pile body 2 may be a pile body structure with higher rigidity, such as a tubular pile, so as to improve the rigidity and the stress performance of the whole structure of the clutch type supporting pile, and the pile body lengths of the first pile body 1 and the second pile body 2 may be respectively determined according to the condition of a construction site. The second pile body 2 can be only provided with a second butt joint part 6 outside the pile body independently and is connected with the corresponding first butt joint part 5 of the first pile body 1, so that a supporting pile with an integral effect is formed, and a supporting function is realized. The butt joint structure with the first pile body 1 is arranged on only one side of the second pile body 2, so that compared with a traditional in-line arrangement method, the butt joint structure of the second pile body 2 is reduced, the structure of the supporting pile related parts is simplified, and the cost is reduced. When the building envelope is constructed with the second pile body 2, the first pile body 1 can be arranged on the earth facing surface of the building envelope as shown in fig. 3 according to the use condition, and can also be arranged on the earth backing surface of the building envelope as shown in fig. 4. Further, referring to fig. 5, at least two second butt-joint parts 6 may be disposed at different positions of the second pile body 2 to realize the connection function at the corresponding positions, so as to expand the combined connection capability of the clutch-type support pile. Referring to fig. 6, the clutch type support pile is provided with two rows of first pile bodies 1 along the arrangement direction, the second pile bodies 2 are adjacent between the two rows of first pile bodies 1 and are respectively connected with the first butt joint parts 5 of the first pile bodies 1 through the second butt joint parts 6 at corresponding positions, the second butt joint parts 6 can be symmetrically arranged on two outer sides of the second pile bodies 2, and can be flexibly arranged according to the arrangement of the support pile on the construction site according to the butt joint requirement with the first pile bodies 1. Therefore, the second butt joint parts 6 of the second pile body 2 of the clutch type support pile are arranged at different positions of the pile body, so that the second butt joint parts can be used for building a waterproof function with better effect by additionally arranging the first pile body 1 with the support water stopping function, and the modularization and expansibility of the clutch type support pile are enhanced.
In this example, the clutch type supporting pile can be planted along the rock soil layer to a design depth, in order to ensure the connection stability and the supporting stability of the corresponding pile body along the length direction of the clutch type supporting pile body, the first butt joint part 5 is arranged along the length direction of the first pile body 1, the second butt joint part 6 is arranged along the length direction of the second pile body 2, so that the first pile body 1 and the second pile body 2 form a stable connection supporting along the length direction of the pile body to form a supporting pile with an integral effect, specifically, the first butt joint part 5 and the second butt joint part 6 can be arranged along the integral through length of the corresponding pile body, the length of the first butt joint part is identical with the length of the corresponding pile body, and the length of the first butt joint part and the second butt joint part can be smaller than the length of the corresponding pile body according to design calculation; the first butt joint part 5 and the second butt joint part 6 can be fixedly connected with the corresponding pile body structure in a welding mode. Likewise, the joint parts 4 at two ends of the first pile bodies 1 adjacent along the arrangement direction can also be integrally arranged along the pile bodies to form stable and reliable connection, so as to form the integrally-acting support pile.
The first butt joint part 5 and the second butt joint part 6 for realizing connection between the first pile body 1 and the second pile body 2 can be of various structural modes, the first butt joint part 5 and the second butt joint part 6 can respectively comprise a convex body structure and a concave body structure which is matched with the convex body structure in shape and is in embedded connection, so that the first pile body 1 and the second pile body 2 can be reliably connected with each other through the first butt joint part 5 and the second butt joint part 6 respectively, a small tongue-and-groove lock connection mode shown in fig. 2 can be adopted, and tension, pressure, shearing force, bending moment, torque and the like can be transmitted when the lateral stress unbalance state is basically relieved, and the corresponding pile bodies can be separated by overcoming friction force along the setting direction of the small tongue-and-groove lock. It should be noted that the structure of the joint portion 4 of the first pile body 1 at two ends along the arrangement direction may be similar to the structures of the first butt joint portion 5 and the second butt joint portion 6, for example, the small tongue-and-groove latch connection manner shown in fig. 2, so that the construction connection is conveniently performed by adopting the finished standard component, and different differential connection structures may be adopted according to specific construction conditions, so as to meet the construction requirements under special conditions.
During construction, the first pile body 1 is connected along the arrangement direction through the joint parts 4 arranged at two ends, the second pile body 2 can be sequentially arranged at corresponding connection positions on one side of the first pile body 1 along the arrangement direction, and can also be arranged on one side of the first pile body 1 at intervals along the arrangement direction, for example, the interval setting method shown in fig. 11 and 12 can be flexibly selected according to actual situation requirements, and the specific interval method is not limited to the schematic mode given in the example. The first pile body 1 realizing the support water stopping function and the second pile body 2 realizing the support function are respectively arranged, so that the problems that the construction efficiency is low when the two pile bodies are arranged in the same row in a sleeving manner in a traditional method, and the recovery is difficult due to the fact that the connecting parts are locked due to construction when the first pile body 1 and the second pile body 2 are implanted into the pile bodies are solved, the pile bodies with different structures and functions are independent and connected with each other, the use requirement is met, and meanwhile, the construction efficiency and the engineering quality are improved.
When the clutch type support pile is used for completing the support function and needs to be recovered, grouting pipes are respectively arranged on the first pile body 1 and the second pile body 2 along the implantation direction so as to realize grouting or water injection operation on the rock soil layer at the pile body position during construction in order to reduce the influence on the construction environment. The grouting pipes can be arranged at the first butt joint part 5 and the second butt joint part 6 of the first pile body 1 and the second pile body 2, and can also be arranged at corresponding positions which are convenient to process or construct according to construction conditions and concrete pile body structures so as to respectively form the first pile body grouting pipe 71 and the second pile body grouting pipe 72 and realize grouting operation for corresponding positions such as a first pile body grouting reinforcement position 8 and a second pile body grouting reinforcement position 9. Further, in order to construct a rigid support system with higher stability, referring to fig. 7 and 8, at least a third pile body 3 is further provided on one side of the first pile body 1 to further improve the support rigidity; the third pile body 3 and the second pile body 2 can be arranged on the same side of the first pile body 1 at intervals according to actual situation requirements, please refer to the interval setting method shown in fig. 13 and 14, and it should be noted that the specific interval setting method of the third pile body 3 and the second pile body 2 can be flexibly selected according to actual situation requirements, and is not limited to the schematic mode shown in this example; in addition, the second pile body 2 and the third pile body 3 can be flexibly selected to be arranged on different sides corresponding to the first pile body 1 according to different use requirements, for example, fig. 15-fig. 18 are respectively the second pile body 2 and the third pile body 3 arranged on the concave side of the first pile body 1, and fig. 19-fig. 22 are respectively the second pile body 2 and the third pile body 3 arranged on the convex side of the first pile body 1, so as to realize different arrangement and use methods of the first pile body 1, the second pile body 2 and the third pile body 3 of the clutch type support pile corresponding constituent parts, so that the corresponding support structure can be flexibly arranged according to the actual construction requirements on site, and the support structure is constructed, and is not limited to the schematic mode given in this example. Further, the third pile body 3 is also provided with grouting pipes at corresponding positions of the pile bodies along the implantation direction to form a third pile body grouting pipe 73, so as to implement grouting operation on the rock-soil layer at the corresponding pile body position, such as the third pile body grouting reinforcement position 10, during construction. Preferably, in this embodiment, the first pile body 1 adopts a sheet pile such as a larsen steel sheet pile, the second pile body 2 adopts a tubular pile such as a steel pipe pile, and the third pile body 3 adopts a section steel such as an H-section steel, as shown in fig. 1-14; or the first pile body 1 adopts a hat-shaped steel sheet pile as shown in fig. 15-22.
In use, for example, in a scheme of 'one-insert one-jump one' which adopts a small tongue-and-groove lock catch connection mode and is arranged on one side, a foundation pit is positioned in a soft soil layer, the excavation depth is 4.75 m, and main physical and mechanical property indexes of each soil layer in the influence range of the excavation depth of the foundation pit are shown in the following table.
The steel pipe pile with the unilateral small tongue-and-groove lock catch connection mode is 630mm in diameter, 14mm in wall thickness, 13m in length and 1600mm in interval, Q335 in steel grade and 271cm in section area 2 128574cm of section moment of inertia of steel pipe pile 4 Ground overload 20kPa; the Larson steel sheet pile is hot rolled U400-170, has the width of 400mm and is steel grade Q335.
According to formula I c ＝I+A(h c -h 1 ) 2 +I'+A'(h c -h 2 ) 2 Wherein:
I c : section moment of inertia (cm) of combined section of steel pipe pile and Larson steel sheet pile along bending moment acting direction 4 )；
I: moment of inertia (cm) of section of steel pipe pile 4 )；
I': larson steel sheet pile section moment of inertia (cm) 4 )；
A: section area (cm) of steel pipe pile 2 )；
A': larson steel sheet pile sectionArea (cm) 2 )；
h c : the height (cm) of the centroid of the combined section of the steel pipe pile and the Larson steel sheet pile;
h 1 : the height (cm) of the centroid of the section of the steel pipe pile;
h 2 : and the height (cm) of the centroid of the section of the Larson steel sheet pile.
The calculated moment of inertia of the combined section of the steel pipe pile and the Larson steel sheet pile is 612522cm 4 When only the steel pipe pile is used, referring to fig. 23 (a), the foundation pit is located at about 5.5m below the ground, and the maximum deformation of the foundation pit is 24.7mm; when the steel pipe pile and the Larson steel sheet pile are combined together, referring to FIG. 23 (b), the foundation pit is located at about 5.5m below the ground surface, the maximum deformation is 12.2mm, and the maximum resisting bending moment is about 2.42 times (calculated according to the supporting edge length per linear meter) that of the steel pipe pile.
In a specific construction, referring to fig. 9, when the clutch type support pile includes a first pile body 1 and a second pile body 2, the following steps may be adopted:
s1, on-site measurement lofting, and constructing and implanting a first pile body 1;
s2, embedding a second butt joint part 6 of the second pile body 2 and a first butt joint part 5 of the first pile body 1 at corresponding positions, and constructing and implanting the second pile body 2;
s3, after the clutch type support pile is used for completing the support function, the second pile body 2 is recovered, and grouting reinforcement is carried out on the rock-soil layer at the position of the pile body through a grouting pipe;
s4, recovering the first pile body 1, and grouting and reinforcing the rock and soil layer at the pile body position through a grouting pipe.
Referring to fig. 10, when the clutch type support pile includes a first pile body 1, a second pile body 2 and a third pile body 3, the following steps may be performed:
t1, on-site measurement lofting, and constructing and implanting a first pile body 1;
t2, embedding a second butt joint part 6 of the second pile body 2 and a first butt joint part 5 of the first pile body 1 at corresponding positions, and constructing and implanting the second pile body 2;
t3, constructing and implanting a third pile body 3;
t4, after the clutch type supporting pile is used for supporting, recovering the third pile body 3, and grouting and reinforcing a rock-soil layer at the position of the pile body through a grouting pipe;
t5, recycling the second pile body 2, and grouting and reinforcing a rock-soil layer at the position of the pile body through a grouting pipe;
and T6, recovering the first pile body 1, and grouting and reinforcing the rock and soil layer at the pile body position through a grouting pipe.
Therefore, the connection mode and structure of the corresponding pile body of the clutch type support pile enable each pile body to be constructed and recovered respectively, avoid mutual influence, further guarantee the overall functionality of the support pile structure, improve the independence of the corresponding pile body, and improve the construction efficiency.
In order to reduce the influence of construction environment, each pile body structure of the clutch type support pile can be constructed in a mode of resonance-free vibration hammers, static pressure and the like. After the construction or the basement earthwork backfill is completed, the clutch type support pile can be recovered in modes of resonance-free vibration hammer, static pulling and the like to reduce the environmental influence. In order to further reduce the environmental impact, for the hard soil of the old clay layer, iron plate sand, pebbles, rocks and the like with high requirements on the surrounding environment or relatively good foundation soil, non-soil taking forced stirring or high-pressure water injection grouting of a grouting pipe can be adopted to pre-drill holes and mix cement mixing amount with the content of not more than 10 percent, so that the construction method of the clutch type support pile is economical and reliable, strong in soil adaptability and higher in environmental friendliness degree.
In summary, the application provides a clutch type support pile and a construction method, so that the construction efficiency and the structural rigidity of the support pile can be improved, the construction operation difficulty can be reduced, the influence on the surrounding environment in the construction process can be reduced, and the economic benefit can be improved, thereby solving the problems that the construction efficiency of the existing deep foundation pit support structure is low, the difficulty is high, the expandability of the pile body structure is insufficient, the engineering quality is difficult to ensure, and the influence on the construction environment is easy to cause.
Finally, it should be noted that: it is apparent that the above examples are only examples for clearly illustrating the present application and are not limited to the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are intended to be within the scope of the present application.
Claims (10)
1. A clutch support pile comprising:
the first pile body is of a platy structure so as to realize the construction of a supporting surface by implanting a rock-soil layer along a corresponding direction, and joint parts are arranged at two ends of the first pile body along the arrangement direction so as to realize a connecting function;
the second pile body is adjacent to one side of the first pile body along the implantation direction of the first pile body so as to improve the supporting rigidity, the first pile body is provided with a first butt joint part at the adjacent position, and the second pile body is provided with a second butt joint part so as to realize mutual reliable connection.
2. A clutch support pile according to claim 1, wherein the second pile body is provided with at least two second butt-joint parts at different positions of the pile body to realize a connection function at corresponding positions, thereby expanding the combined connection capability of the clutch support pile.
3. A clutch support pile according to claim 2, wherein the clutch support pile is provided with at least two rows of first pile bodies along the arrangement direction, and the second pile bodies are adjacent between the two rows of first pile bodies and are respectively connected with the first butt joint parts of the first pile bodies through the second butt joint parts at corresponding positions.
4. A clutch support pile according to claim 3, wherein the first abutting portion is provided along the length direction of the first pile body, and the second abutting portion is provided along the length direction of the second pile body, so that the connection force between the first pile body and the second pile body along the length direction of the pile body is reliable, and thus the integrally acting support pile is constructed.
5. The clutch support pile of claim 4, wherein the first and second butt joint portions each comprise a convex structure and a concave structure adapted to the shape of the convex structure and engaged with the convex structure, so that the first and second piles can be reliably connected to each other through the first and second butt joint portions, respectively.
6. A clutch support pile according to any one of claims 1 to 5, characterised in that the first pile body and the second pile body are provided with grouting pipes along the direction of implantation respectively for grouting or water injection of the rock-soil layer at the location of the pile bodies during construction.
7. A clutch support pile according to claim 6, wherein the second pile bodies are arranged at intervals along the direction of arrangement on one side of the first pile bodies.
8. The clutch support pile according to claim 6, wherein the clutch support pile is further provided with at least a third pile body at one side of the first pile body to further improve support rigidity; the third pile body is provided with a grouting pipe along the implantation direction so as to realize grouting or water injection operation on the corresponding pile body position during construction.
9. A clutch support pile according to claim 8, wherein the third pile body and the second pile body are arranged at intervals on the same side of the first pile body.
10. A method of constructing a clutch support pile according to claim 7, comprising the steps of:
s1, on-site measurement lofting, and constructing and implanting a first pile body;
s2, embedding a second butt joint part of the second pile body and a first butt joint part of the first pile body at the corresponding position, and constructing and implanting the second pile body;
s3, after the clutch type support pile is used for completing the support function, the second pile body is recovered, and grouting reinforcement is carried out on the rock-soil layer at the position of the pile body through a grouting pipe;
s4, recovering the first pile body, and grouting and reinforcing the rock and soil layer at the position of the pile body through a grouting pipe.
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