CN220057899U - Differential mutual clutch type supporting pile - Google Patents

Abstract

The utility model provides a differential clutch type support pile, which relates to the field of foundation pit engineering of geotechnical engineering and cofferdam engineering of hydraulic engineering, and comprises 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-soil layer along a corresponding direction, and first 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 implanted into a rock soil layer along the arrangement direction of the first pile body so as to improve the supporting rigidity of the supporting pile; the first pile bodies are adjacent to the second pile bodies at intervals along the arrangement direction, and the second pile bodies are provided with second joint parts which are matched with the first joint parts at corresponding adjacent positions so as to realize mutual reliable connection. The differential clutch type support pile can improve the dispersion and expandability of the support pile structure, enhance the rigidity and bending resistance of the structure, reduce the construction operation difficulty, reduce the influence on the surrounding environment in the construction process, and improve the construction efficiency and economic benefit.

Description

Differential mutual clutch type supporting pile

Technical Field

The utility model relates to the field of foundation pit engineering of geotechnical engineering and cofferdam engineering of hydraulic engineering, in particular to a differential clutch type support pile.

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.

Because a large amount of slurry exists in the construction process of the underground diaphragm wall and the bored pile, the influence on the surrounding environment is large, and steel bars and concrete are used in a large amount, the construction cost is high, and the development concept of 'carbon reaching peak and carbon neutralization' which are greatly popularized by the nation is not consistent; 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 adopting H-shaped steel and Larson steel sheet piles to form a separated combined pile, so that the water-stopping effect is better, the integrity is relatively poorer, the steel consumption is larger, and the rigidity and the stress performance are general; when the PC construction method pile is combined by adopting the steel pipe pile and the Lasen steel plate pile, the overall rigidity is high, the water stopping and stress performance is good, but because the existing steel pipe pile in the market has less stock, the transportation and stacking are inconvenient, the field welding difficulty is extremely high, the recovery cannot be carried out in a static pulling mode or the like in the later period, and the environmental impact is large due to the long-time vibration of the larger-power vibration equipment. When the H-shaped steel pile and the Lasen steel plate pile are combined, the overall rigidity is high, the water stopping and stress performance is good, the recovery can be carried out in a mode of avoiding resonance or static pulling and the like in the later period, but in actual engineering, if a mode of 'beating one jump one' of one H-shaped steel and one Lasen pile is adopted, in order to ensure the water stopping effect, the lock catches welded on the H-shaped steel are always arranged in a full length mode, because the lock catches are long, the Lasen pile and the adjacent H-shaped steel are connected through small rabbets, the recovery difficulty is high, the Lasen pile and the small rabbets of the H-shaped steel are in a locking state in extreme case, the recovery is difficult to be carried out smoothly in a mode of avoiding resonance or static pulling and the like, the construction period is influenced, and the construction cost is further increased, so that the popularization and the further application of the construction method are influenced; in addition, H-shaped steel with the main model of H700 multiplied by 300 multiplied by 13 multiplied by 24 and the steel with the model of Q235 exists in a large number on the market, the bending resistance is limited, and if the section steel with higher strength is adopted, the construction cost is higher; in addition, because Larson piles exist among H-shaped steel, the space between H-shaped steel and welded small tongue-and-groove lock catches cannot be further reduced, so that the section steel space of a pile of an HC construction method in a 'one-jump-and-one-way' mode is smaller than that of a pile of an SMW construction method (the section steel minimum design space is 600 mm) and a pile of a TRD construction method (the section steel minimum design space is 500 mm), and the rigidity of the conventional HC construction method is smaller when the Larson pile is not considered; if the lock catch H-shaped steel is adopted for direct sleeving, the space is reduced, the rigidity is increased to some extent, but the construction difficulty is extremely high, the lock catch H-shaped steel cannot be recovered, and the engineering cost is greatly increased. The conventional HC construction method pile has higher construction difficulty on hard soil, sand layers, round gravel or rock and other strata with relatively good soil properties; the length of the conventional Larson pile is 15-18m, the conventional HC construction method pile cannot effectively partition the silt soil stratum with the length of more than 20-30m, and the accident risk of foundation pit water leakage caused by the fact that local small tongue-and-groove lock catches cannot be effectively connected exists.

In summary, although the existing pile type and construction method adopted in deep foundation pit engineering achieve a certain expected effect under the appropriate engineering environment conditions, there are still 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 corresponding support pile structure that structural expansibility is strong, the efficiency of construction is high, structural rigidity is big, warp little, the stagnant water effect is good, engineering quality is reliable, economic benefits is good to promote the piling quality and the performance of supporting pile, can shorten construction period simultaneously, reduce the influence to the surrounding environment in the work progress.

Disclosure of Invention

The utility model provides a differential clutch type support pile, which can improve the dispersion and expandability of the support pile structure, enhance the structural rigidity and bending resistance, reduce the construction operation difficulty, reduce the influence on the surrounding environment in the construction process and improve the construction efficiency and economic benefit.

The technical scheme adopted for solving the technical problems is as follows: the differential clutch type supporting 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 first 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 implanted into the rock soil layer along the setting direction of the first pile body so as to improve the supporting rigidity of the supporting pile.

The first pile bodies are adjacent to the second pile bodies at intervals along the arrangement direction, and the second pile bodies are provided with second joint parts which are matched with the first joint parts at corresponding adjacent positions so as to realize mutual reliable connection.

In a specific embodiment, the first pile body is adjacently provided with the second pile body along one side of the bearing direction of the support pile so as to further improve the support rigidity of the support pile along the bearing direction.

In a specific embodiment, the first pile body is provided with a first scarf joint part at a corresponding position along the bearing direction of the support pile and adjacent to one side of the second pile body, and the second pile body is provided with a second scarf joint part matched with the first scarf joint part so as to realize mutual reliable connection.

In a specific embodiment, the first scarf joint portion is arranged along the length direction of the first pile body, and the second scarf joint portion is arranged along the length direction of the second pile body, so that connection stress formed by the first pile body and the second pile body along the length direction of the pile body is reliable, and a supporting pile with an integral effect is constructed.

In a specific embodiment, the first joint part and the second joint part respectively comprise a convex body structure and a concave body structure which is matched with the shape of the convex body structure and is in embedded connection 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 joint part and the second joint part respectively.

In a specific embodiment, the second pile body is provided with a grouting pipe along the implantation direction so as to perform grouting or water injection operation on the rock soil layer at the position of the pile body during construction.

In a specific embodiment, the plate-shaped structure of the first pile body is formed with through grooves, and the directions of the notch of the through grooves of the closely arranged first pile bodies are opposite along the bearing direction of the support pile, so that the arrangement of the first pile bodies has diversity along the bearing direction to further improve the bending resistance of the support pile.

In a specific embodiment, the tops of the first pile body and the second pile body are provided with and embedded into a reinforced concrete structure so as to improve the integrity and the water stopping effect of the support pile structure.

In a specific embodiment, the second pile body is an H-shaped steel, and the H-shaped steel comprises a web plate and flange plates connected to two sides of the web plate; the second scarf joint portion is the flange plate of H shaped steel, first scarf joint portion is the space that encloses with flange plate shape looks adaptation that first pile body formed through the slat that sets up in the relevant position.

In a specific embodiment, the web of the H-section steel is provided with reinforcing plates in a superposed manner to further enhance the structural strength of the H-section steel.

The utility model has the advantages that:

1. the differential mutual clutch type supporting pile is characterized in that the first pile body realizing the supporting water stopping function and the second pile body realizing the supporting function are distributed adjacently, so that the interactivity and uniformity of the supporting pile in different functional pile body structural arrangement are improved, the realization of the corresponding water stopping function and the supporting function of each local structural position of the supporting pile is ensured, the local functional defect or the loss risk is reduced, meanwhile, the pile bodies with different structures and functions are mutually independent and are mutually connected, and the construction efficiency and the engineering quality are improved.

2. The connection structure of the differential clutch type support pile can further expand the specific function of the support pile, a first scarf joint part is arranged on one side of the support pile along the bearing direction of the support pile through a first pile body, and a second scarf joint part with the structural shape being matched with the corresponding position of a second pile body is arranged to realize mutual reliable connection, so that the support rigidity of the support pile is further improved, and the deformation of a foundation pit is greatly reduced.

3. The connection mode and the structure of the differential clutch type support pile enable the through groove to be formed by the structure of the first pile body when the support function is formed, the notch orientations of the through grooves of the first pile body which are arranged nearby are oppositely arranged along the bearing direction of the support pile, the diversity of the first pile body which is arranged along the bearing direction is improved, and the diversity of the second pile body which is adjacent to one side of the first pile body along the bearing direction of the support pile is improved, and therefore the integral bending section coefficient of the support pile is further improved.

4. The connection mode and the structure of the corresponding pile bodies of the differential mutual clutch type support pile enable each pile body to be constructed and recycled respectively, avoid mutual influence, further ensure the integral functionality of the support pile structure, improve the independence of the corresponding pile bodies, enhance the modularization and expansibility of the differential mutual clutch type support pile and improve the construction efficiency.

5. The differential clutch type support pile is provided with the grouting pipe on the corresponding pile body structure so as to realize grouting or water injection operation on the rock soil layer at the pile body position during implantation and recovery, further reduce the influence on the construction environment and improve the engineering construction benefit and efficiency.

6. The differential clutch type supporting pile can be formed by pouring reinforced concrete structures at the tops of the first pile body and the second pile body, so that an integrated capping beam structure of the supporting pile is constructed, and the integrity and the water stopping effect of the supporting pile structure are further improved.

Drawings

FIG. 1 is a schematic view of a differential clutch support pile and a method for installing the same according to the present utility model;

FIG. 2 is a partial schematic view of a construction and arrangement method of a differential clutch support pile according to the present utility model;

FIG. 3 is a schematic diagram of a method for arranging differential clutch type supporting piles in sequence by a first pile body and a second pile body at intervals;

FIG. 4 is a schematic diagram of a second method for arranging differential clutch type supporting piles sequentially and alternately from a first pile body to a second pile body;

FIG. 5 is a schematic diagram of a method for arranging differential clutch type supporting piles in sequence by a first pile body and a second pile body at intervals;

FIG. 6 is a schematic diagram of a method for arranging differential clutch type supporting piles sequentially and alternately from two first piles and one second pile;

FIG. 7 is a second schematic diagram of a method for arranging differential clutch type supporting piles sequentially and alternately from two first piles and one second pile;

FIG. 8 is a schematic diagram of a method for arranging differential clutch type supporting piles sequentially and alternately from two first piles and one second pile;

FIG. 9 is a schematic diagram of a method for arranging three first pile bodies and one second pile body at intervals in sequence;

FIG. 10 is a second schematic diagram of a method for arranging three first pile bodies and one second pile body at intervals in sequence;

fig. 11 is a schematic diagram illustrating a method for arranging three first pile bodies and one second pile body at intervals in sequence.

The main reference numerals illustrate:

1-a first pile body; 2-a second pile body; 3-a first joint; 4-a second joint; 5-cement soil pile wall; 6-lath; 7-grouting pipe; 8-reinforcing plate.

Detailed Description

The embodiment of the utility model solves the problems of low construction efficiency, high difficulty, insufficient expandability of a pile body structure, difficult guarantee of engineering quality and easy influence on construction environment of the traditional deep foundation pit support structure by providing the differential clutch type support pile, and the general thinking is as follows:

referring to fig. 1 and 2, the present utility model provides a differential clutch support pile, which comprises 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 first pile body 1 is provided with first joint parts 3 at two ends along the arrangement direction so as to realize the connection function; the second pile body 2 is planted in a rock soil layer along the arrangement direction of the first pile body 1 so as to improve the supporting rigidity of the supporting pile; the first pile bodies 1 are adjacent to the second pile bodies 2 at intervals along the arrangement direction, and the second pile bodies 2 are provided with second joint parts 4 which are matched with the first joint parts 3 at corresponding adjacent positions so as to realize mutual reliable connection. This poor separation and reunion formula support stake is through the first pile body 1 that will realize supporting the stagnant water function, the second pile body 2 that realizes the supporting function are adjacent to interactive and homogeneity when improving the different function pile body structure of support stake and arranging, with the realization of guaranteeing the corresponding stagnant water function in each local structure position of support stake and supporting function, reduce local functional defect or lack risk, make the pile body of different structures and functions both mutually independent and interrelationship simultaneously, improved efficiency of construction and engineering quality.

In this example, the first pile body 1 and the second pile body 2 may have multiple structures of the first joint portion 3 and the second joint portion 4, where the first joint portion 3 and the second joint portion 4 may each include 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 pile body 1 and the second pile body 2 may be reliably connected with each other through the first joint portion 3 and the second joint portion 4, respectively, to form an integrally acting supporting pile, such as a small tongue-and-groove lock connection manner shown in fig. 2, where the manner may transmit a tensile force, a pressure, a shearing force, a bending moment, a torque, and the like when the lateral stress imbalance state is substantially relieved, and the corresponding pile body may be separated by overcoming a friction force along the setting direction of the small tongue-and-groove lock. Specifically, the first joint part 3 may be integrally formed along the length direction of the first pile body 1, and the second joint part 4 may be integrally formed along the length direction of the second pile body 2, so as to form a stable and reliable connection, thereby forming an integrally-acting support pile.

In order to further improve the supporting rigidity, please continue to refer to fig. 1 and 2, in this example, a second pile body 2 is adjacently disposed on one side of the first pile body 1 along the horizontal bearing direction of the supporting pile so as to further improve the supporting rigidity of the supporting pile along the horizontal bearing direction; further, the first pile body 1 is provided with a first scarf joint part at a corresponding position along the horizontal bearing direction of the support pile and adjacent to one side of the second pile body 2, and the second pile body 2 is provided with a second scarf joint part matched with the first scarf joint part so as to realize mutual reliable connection. It should be noted that when the differential clutch type supporting pile is provided with the corresponding first pile body 1 and the corresponding second pile body 2 along the arrangement direction, the first scarf joint portion and the second scarf joint portion can be selectively arranged on the first pile body 1 and the second pile body 2 at the corresponding arrangement positions according to the construction condition to construct connection, for example, as shown in fig. 3 and fig. 4. The structures of the first scarf joint part and the second scarf joint part can be similar to those of the first joint part 3 and the second joint part 4, such as the small tongue-and-groove lock connection mode, so that the construction connection is conveniently performed by adopting a finished product standard component, and different adaptive connection structures can be adopted according to specific construction conditions so as to meet the construction requirements under specific conditions, for example, as shown in fig. 2 in the example. Specifically, the first scarf joint part can be arranged along the length direction of the first pile body 1, the second scarf joint part can be arranged along the length direction of the second pile body 2, so that the connection stress formed by the first pile body 1 and the second pile body 2 along the length direction of the pile body is reliable, and thus a supporting pile with an integral effect is constructed, for example, the first scarf joint part and the second scarf joint part can be respectively arranged along the integral through length of the corresponding pile body, the length of the first scarf joint part and the second scarf joint part can be the same as the length of the corresponding pile body, and the length of the first scarf joint part and the second scarf joint part can be smaller than the length of the corresponding pile body according to design calculation; the first scarf joint part and the second scarf joint part can be connected and fixed on corresponding pile body structures in a welding mode.

The arrangement method of the first pile bodies 1 adjacent to the second pile bodies 2 at intervals along the arrangement direction, and the arrangement method of the first pile bodies 1 adjacent to the second pile bodies 2 along one side of the horizontal bearing direction of the supporting pile are various, and taking given several exemplary interval arrangement methods as examples, the arrangement method of one first pile body 1 and one second pile body 2 sequentially arranged at intervals as shown in fig. 3-5, the arrangement method of two first pile bodies 1 and one second pile body 2 sequentially arranged at intervals as shown in fig. 6-8, and the arrangement method of three first pile bodies 1 and one second pile body 2 sequentially arranged at intervals as shown in fig. 9-11 can also be flexibly arranged according to the site construction conditions, and the arrangement positions of the corresponding first scarf joint part and the second scarf joint part of the first pile bodies 1 and the second pile bodies 2 which are connected along the horizontal bearing direction of the supporting pile are not limited to the illustrative method given in this example.

In addition, when the differential clutch type support pile is used for completing the support function, and needs to be recovered, in order to reduce the influence on the construction environment, the grouting pipe 7 can be selectively arranged on the corresponding second pile body 2 along the implantation direction according to specific conditions so as to realize grouting or water injection operation on the rock soil layer at the pile body position during construction. The grouting pipe 7 can be arranged at the corresponding position which is convenient to process or construct according to the construction condition and the concrete pile body structure. In the concrete construction, non-soil-taking forced stirring or high-pressure water injection grouting of a grouting pipe 7 can be adopted to perform pre-hole guiding, and cement doping amount of 5-10% is doped; after the second pile body 2 and the first pile body 1 are recycled, grouting reinforcement is carried out by using grouting pipes 7 at corresponding positions, and the cement mixing amount of grouting can be 5-10%, so that the adaptability and environmental friendliness of the differential clutch type support pile to the soil quality of the construction environment are further improved.

In order to realize larger cross-sectional moment of inertia, the structure and layout of the related pile bodies can be further optimized along the neutral axis of the cross section of the horizontal bearing direction of the support pile, preferably, the plate-shaped structure of the first pile body 1 is provided with through grooves, and the directions of the notch directions of the through grooves of the closely arranged first pile bodies 1 are opposite to each other along the horizontal bearing direction of the support pile, for example, as shown in fig. 6-11, so that the arrangement of the first pile bodies 1 has the diversity along the horizontal bearing direction, and the cross-sectional moment of inertia and the bending resistance of the support pile are further improved.

In this embodiment, the tops of the first pile body 1 and the second pile body 2 may be set and embedded into a reinforced concrete structure, so as to improve the integrity and the water-stopping effect of the support pile structure. In the construction process, for construction working conditions with higher water stopping requirements and environmental requirements or deep silt soil layers, corresponding cement-soil pile wall construction equipment can be adopted to form piles or walls in advance according to design requirements, cement with a certain content is doped, the cement-soil pile wall construction equipment for stirring or forming the walls in advance comprises single double-shaft equipment, triaxial and multiaxial equipment, TRD equipment for canal cutting, CSM equipment for radial cutting and double-wheel milling and the like, the cement-soil pile wall construction equipment is used for forming piles or walls in advance and enters a relatively deep or hard rock soil layer to form a cement-soil pile wall 5, and the first pile body 1 and the second pile body 2 can be implanted before the cement-soil pile wall 5 is not coagulated; for convenient recovery, the first pile body 1 and the second pile body 2 can be coated with antifriction agents, for example, the dosage of the antifriction agents is 0.1-1.1 kg per square meter; in addition, according to the construction condition, the corresponding structure part of the cemented soil pile wall 5 can be subjected to differential construction so as to adapt to the working condition environment requirements of the first pile body 1 and the second pile body 2 which are positioned at the structure part, for example, the cement doping amount of 0-30% of the reinforcing soil doping mass of the corresponding position of the cemented soil pile wall 5 in the lower range of the first pile body 1 and the second pile body 2 is required to be added according to water stop, and the cement doping amount of 0-10% of the reinforcing soil doping mass of the corresponding position of the cemented soil pile wall 5 in the upper range of the first pile body 1 and the second pile body 2 is required to be added; meanwhile, according to the construction environment, 0-5 per mill of solidifying agents such as SN201-A and the like with the mass of cement are doped into the soft soil layer, and 0-10 percent of solidifying agents such as bentonite and the like with the mass of cement are doped into the silt soil layer, so that the water-stopping and soil-retaining differential mutual clutch type supporting pile is further ensured to be formed.

After the construction or basement earthwork backfilling is finished, the second pile body 2 without the second scarf joint part can be recovered, the second pile body 2 with the second scarf joint part is recovered, the first pile body 1 without the first scarf joint part and the first pile body 1 with the first scarf joint part are recovered, and corresponding pile bodies can be recovered in a mode of avoiding resonance vibration hammers or static pulling and the like to reduce environmental influence, so that the construction structure of the differential clutch type support pile has high rigidity, small deformation, good water stopping effect, reliable quality and high construction efficiency, the problem of slurry outward transportation during operation is avoided, the influence on the surrounding environment is reduced, and the application range and the application method of the conventional HC construction method pile are expanded.

Preferably, the first pile body 1 can be a Larson steel sheet pile, the second pile body 2 can be H-shaped steel, and the H-shaped steel comprises a web plate and flange plates connected to two sides of the web plate; therefore, referring to fig. 2, the second scarf joint portion is an edge plate of the H-shaped steel, the first scarf joint portion is an enclosure space formed by the first pile body 1 at a corresponding position through the set lath 6 and adapted to the shape of the edge plate, the web plate of the H-shaped steel is overlapped with the reinforcing plate 8 to further enhance the structural strength of the H-shaped steel, and the reinforcing plate 8 can be integrally arranged on the web plate along the length direction of the H-shaped steel in a whole length manner, and also can be arranged on the web plate at intervals in sections. During construction, corresponding H-shaped steel and Lasen steel sheet piles are driven into after the drawing is set out, and in order to reduce adverse environmental influence during construction, construction in a mode of avoiding resonance vibration hammers or static pressure and the like can be adopted. In order to strengthen the supporting rigidity of the supporting pile and reduce the deformation of the foundation pit, the H-shaped steel can be increased according to calculation between the H-shaped steels provided with the second joint parts 4, and the H-shaped steels can be directly planted on one side of the Larson steel sheet pile in the horizontal bearing direction, or further, the Larson steel sheet pile provided with the first joint parts correspondingly is connected more firmly through the second joint parts. The top of the H-shaped steel and the top of the Lassen steel sheet pile can be integrally cast by adopting reinforced concrete, and a capping beam structure is constructed, so that the water stopping effect is enhanced.

In summary, the utility model provides the differential clutch type support pile, which can improve the diversity and the expandability of the support pile structure, enhance the rigidity and the bending resistance of the structure, reduce the construction operation difficulty, reduce the influence on the surrounding environment in the construction process and improve the construction efficiency and the economic benefit.

Finally, it should be noted that: it is apparent that the above examples are only illustrative of the present utility model and are not limiting of 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 contemplated as falling within the scope of the present utility model.

Claims (10)

1. A differential 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 first 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 implanted into the rock soil layer along the arrangement direction of the first pile body so as to improve the supporting rigidity of the supporting pile;

the first pile bodies are adjacent to the second pile bodies along the arrangement direction at intervals, and second joint parts matched with the first joint parts are arranged at the positions, adjacent to the first pile bodies, of the second pile bodies so as to realize mutual reliable connection.

2. A differential clutch support pile according to claim 1, wherein the first pile body is provided with second pile bodies adjacent to one side of the support pile along the bearing direction thereof to further enhance the support stiffness of the support pile along the bearing direction.

3. A differential clutch support pile according to claim 2, characterised in that the first pile body is provided with a first scarf joint at a corresponding position along the bearing direction of the support pile and adjacent to the second pile body at one side thereof, and the second pile body is provided with a second scarf joint adapted to the first scarf joint for achieving a mutually reliable connection.

4. A differential clutch support pile according to claim 3, wherein the first engagement portion is provided along the length of the first pile body and the second engagement portion is provided along the length of the second pile body, so that the connection forces of the first pile body and the second pile body along the length of the pile body are reliable, thereby constructing the integrally acting support pile.

5. A differential clutch support pile according to claim 4, wherein the first and second engagement portions each comprise a male formation and a female formation adapted to the shape of the male formation and engaged therewith, respectively, such that the first and second piles are securely connected to each other by the first and second engagement portions, respectively.

6. A differential clutch support pile according to claim 4 or claim 5, wherein the second pile body is provided with grouting pipes along the direction of implantation to enable grouting or water injection of the rock formations at the location of the pile body during construction.

7. A differential clutch support pile according to claim 6, wherein the plate-like structure of the first pile body is formed with through grooves, and the directions of the notches of the through grooves of the closely arranged first pile bodies are opposite in the bearing direction of the support pile, so that the arrangement of the first pile bodies has a diversity in the bearing direction to further improve the bending resistance of the support pile.

8. The differential clutch support pile according to claim 7, wherein the tops of the first pile body and the second pile body are provided with and embedded into a reinforced concrete structure so as to improve the integrity and the water stopping effect of the support pile structure.

9. A differential clutch support pile according to claim 7 or 8, wherein the second pile body is an H-section steel comprising a web and flange plates connected to both sides of the web; the second scarf joint portion is the flange plate of H shaped steel, first scarf joint portion is the space that encloses with flange plate shape looks adaptation that first pile body formed through the slat that sets up in the relevant position.

10. A differential clutch support pile according to claim 9, wherein the webs of the H-section steel are provided with reinforcing plates in overlapping relationship to further enhance the structural strength of the H-section steel.