A foundation pit assembled sheet pile and steel pile combined support structure and construction method

Abstract

The present invention relates to the field of civil engineering technology, and specifically to a foundation pit assembled sheet pile and steel pile combined support structure and construction method, including an anti-soil panel and a groove plate, the anti-soil panel and the groove plate are quickly assembled through a designed slide plate and connecting bolts, the anti-soil panel is provided with a reserved connecting steel bar and a pre-buried connecting steel pipe to ensure that the connection between the sheet piles is firm and stable, the anti-soil panel is provided with a limiting convex groove and a limiting groove, and the groove plate is provided with a bolt hole corresponding to the anti-soil panel. The device sets an auxiliary reinforcement body and a limiting stabilizing card between the groove plates used for assembly, and the combination of the set limiting stabilizing card and the auxiliary reinforcement body makes the groove plates used for assembly and splicing more firm, indirectly making the assembled groove plates and the steel piles more firm as a whole, and the set auxiliary reinforcement body will not affect the rapid assembly and disassembly between the groove plates.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering, and in particular to a foundation pit assembled sheet pile and steel pile combined support structure and a construction method. Background Art

[0002] In civil engineering, traditional support methods often face many challenges when supporting foundation pits under coastal mud geological conditions. Due to the special properties of mud geology, such as high water content, low strength, and high compressibility, the excavation and support of foundation pits become extremely difficult. Although traditional support methods such as steel sheet pile support and concrete continuous wall support can meet the support requirements to a certain extent, they have the disadvantages of long construction period, high cost, high requirements for mechanical equipment, and high construction noise. In addition, the connection ends have poor stability during the assembly process of the support, and are easily displaced and tilted due to the extrusion force. When auxiliary reinforcement and stabilization are performed, the assembly and disassembly are cumbersome and inconvenient.

[0003] In recent years, with the continuous development of construction technology, simple steel pile support may not meet the requirements of support stiffness in some cases. Therefore, it is necessary to seek a more effective support structure and its construction method. The present invention proposes a foundation pit assembled sheet pile and steel pile combined support structure and construction method. The support structure combines the advantages of assembled sheet piles and steel piles, and through reasonable connection design and construction methods, it realizes the rapid installation, high-precision assembly and efficient and stable support of the support structure. The support structure and its construction method not only solve the problems existing in traditional support methods, but also improve construction efficiency, reduce construction costs, and are stable and firm to use after assembly. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a foundation pit assembled sheet pile and steel pile combined support structure and a construction method.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a foundation pit assembled sheet pile and steel pile combined support structure and construction method, including an anti-soil panel and a groove plate, the anti-soil panel and the groove plate are quickly assembled through the designed slide plate and connecting bolts, the anti-soil panel is provided with reserved connecting steel bars and embedded connecting steel pipes to ensure that the connection between the sheet piles is firm and stable, the anti-soil panel is provided with limiting convex grooves and limiting grooves, the groove plate is provided with bolt holes corresponding to the anti-soil panel, and the two are quickly connected by connecting bolts and embedded nuts, and a blade foot with a certain inclination is provided under the bottom section of the assembled sheet pile, and the blade foot range extends to the slide plate and the lower part of the connecting circular groove.

[0006] Specifically, during the manufacturing stage of the anti-earth facing panels and groove panels, relatively long prestressed tendons are embedded, and the exposed parts are the connecting steel bars. The embedded connecting steel pipes are threadedly connected to the prestressed tendons. The anti-earth facing panels and groove panels are cured in accordance with the ultra-high performance concrete curing plan, and after the strength is sufficient, the connecting steel bars and embedded connecting steel pipes are cut off according to the design requirements.

[0007] Specifically, a steel pile is arranged at the side end of the soil-resistant panel, connecting steel bars are welded at both ends of the steel pile, and the connecting steel bars are inserted into the connecting circular grooves of the prefabricated sheet piles to achieve a quick and stable connection between the steel pile and the prefabricated sheet pile.

[0008] Specifically, the side ends of the upper and lower assembled groove plates are symmetrically fixed with limit stabilization clamps. The limit stabilization clamp set on the upper groove plate is located below the groove plate, and the limit stabilization clamp set on the bottom groove plate is located above the groove plate.

[0009] Specifically, an auxiliary reinforcement body is arranged on the groove plate arranged at the upper part.

[0010] Specifically, the auxiliary reinforcement body includes a screw control hand wheel, a winding control wheel, a first locking clamping hole, a fixed connecting plate, a first hook and hanging clamping connecting seat, a support control spring, a lifting control rope, a second hook and hanging clamping connecting seat, a lifting control plate, a clamping support plate, a support frame and a second locking clamping hole, the fixed connecting plate and the first hook and hanging clamping connecting seat are distributed on both sides of the support frame, and the first hook and hanging clamping connecting seat is fixedly connected to the bottom end of the fixed connecting plate, the clamping support plate is symmetrically arranged, and the two clamping support plates are respectively located directly below the first hook and hanging clamping connecting seat, and the support control spring is symmetrically clamped and arranged on the first hook The screw control hand wheel is rotatably installed inside the support frame between the hanging card fixing connection seat and the second hook hanging card fixing connection seat arranged at the upper end of the fixing support plate, and the second locking card fixing holes are evenly penetrated and opened on both side ends of the support frame, the winding control wheel is rotatably clamped on the side end of the support frame, and the middle part of the screw control hand wheel is fixedly connected to the middle part of the winding control wheel, the first locking card fixing holes are evenly penetrated and opened on the winding control wheel, the lifting control rope is wound on the winding control wheel, the lifting control plate is fixedly connected to the inner side of the upper end of the fixing support plate, and the bottom end is fixedly connected to the upper end of the lifting control plate.

[0011] Specifically, the first locking clamping hole is adapted to the support frame, and the pin body is inserted into the first locking clamping hole and the second locking clamping hole to be locked between the internal winding control wheel and the support frame.

[0012] Specifically, the fixed connection plate and the support frame are fixedly connected to the groove plate by bolts.

[0013] Specifically, the fixing support plate is adapted to the position-limiting and stabilizing clamping plate, and the fixing support plate is slidably clamped inside the position-limiting and stabilizing clamping plate.

[0014] A construction method for a foundation pit assembled sheet pile and steel pile combined support structure, comprising the following steps:

[0015] S1: First, the soil-resistant panel and the groove plate are connected at the construction site using the connecting bolts and the embedded nuts to realize the assembly of the assembled sheet piles. During the construction process, the bottom section of the assembled sheet pile is first driven into the soil layer using a small pile driver. As the penetration depth increases, the pile driver cannot continue to drive the assembled sheet bricks. The jet pump robot and the water pump are placed in the assembled sheet piles to clean the soil in the assembled sheet piles and flush them to the blade feet. At the same time, the water pump extracts the mud-water mixture, and then the assembled sheet piles are penetrated by cooperating with the pile driving system and the underwater jet robot;

[0016] S2: After the bottom section of the assembled sheet pile is penetrated, the epoxy resin structural adhesive package is placed in the embedded connecting steel pipe, and the reserved connecting steel bars of the assembled sheet pile are inserted into the embedded connecting steel pipe. The epoxy resin structural adhesive package is squeezed and crushed to fill the gap between them, and then the piling process of the piling system and the underwater jet robot is repeated;

[0017] S3: After the installation of the assembled sheet pile is completed, the steel pile is driven into the soil by a pile driving machine. During the driving process, the connecting steel bars of the steel pile need to be inserted into the connecting circular grooves of the assembled sheet pile to ensure that the connecting steel bars and the connecting circular grooves are tightly matched.

[0018] S4: The filling and reinforcing materials required by the design are poured into the prefabricated sheet piles to enhance the integrity and structural strength of the sheet piles. The filling and reinforcing materials ensure the uniformity and density of the filling materials during the pouring process to avoid defects such as voids or cracks. The reinforcing materials can be concrete or cement-solidified soil. At the same time, the support beam assembly is added to the side end of the groove plate during the foundation pit excavation process.

[0019] Beneficial effects of the present invention:

[0020] 1. In terms of the design of the support structure, the present invention makes full use of the respective advantages of prefabricated sheet piles and steel piles, and combines them. The prefabricated sheet piles use prestressed ultra-high performance concrete UHPC as the main material, and are composed of an anti-soil panel and a groove plate structure. For the convenience of processing and manufacturing, the anti-soil panel and the groove plate structure can be assembled quickly and accurately through the designed bolts and slide plate structure, which greatly improves the construction efficiency. In addition, in order to reduce the resistance during the installation process, in terms of connection design, the anti-soil panels of the present invention use a combination of reserved connecting steel bars and pre-buried connecting steel pipes. The setting of the reserved connecting steel bars makes the prefabricated sheet piles more convenient and quick when connected, and the pre-buried connecting steel pipes ensure the firmness and stability of the connection by pre-installing epoxy resin structural glue. In order to further improve the assembly accuracy, the anti-soil panel is specially provided with a limiting groove and a limiting convex groove to ensure the precise alignment of the anti-soil panel during the assembly process, effectively avoiding quality problems caused by assembly errors. As another important component of the support structure, the steel piles are welded with connecting steel bars at both ends of the steel piles, and the connecting steel bars of the steel piles are inserted into the connecting circular grooves of the prefabricated sheet piles. The steel piles and the prefabricated The sheet piles are connected quickly and stably. The main function of the steel piles is to effectively block a large amount of coastal silt soil in the liquid limit state, and the addition of the assembled sheet piles significantly enhances the stiffness and strength of the steel piles, thereby ensuring the bearing capacity and stability of the support structure, so that it can cope with various challenges under complex geological conditions. In terms of construction methods, the present invention adopts advanced equipment such as small pile drivers and underwater jet robots. The small pile drivers are particularly suitable for use in narrow construction sites due to their small size, flexibility and convenience. The underwater jet robot cleans the soil in the assembled sheet piles through high-pressure water flow, and uses mud to lubricate the interface between the assembled sheet piles and the soil to reduce installation friction resistance. This construction method not only improves construction efficiency, but also reduces construction costs and requirements for mechanical equipment. After the construction of the support structure is completed, the present invention also proposes a measure to fill the assembled sheet piles with concrete or cement-cured soil according to design requirements to enhance the integrity and structural strength of the assembled sheet piles. This measure can further improve the stability and durability of the support structure, so that it can better cope with various challenges that may arise during foundation pit excavation.

[0021] Second, the present invention sets an auxiliary reinforcement body and a limit stabilization card plate between the groove plates used for assembly. The limit stabilization card plate and the auxiliary reinforcement body are used in combination, so that the groove plates used for assembly and splicing are more solid, which indirectly makes the assembled groove plates and the steel piles more solid as a whole, and the auxiliary reinforcement body does not affect the rapid assembly and disassembly of the groove plates. Therefore, the foundation pit assembled sheet pile and steel pile combined support structure and construction method proposed by the present invention not only solve the problems existing in the traditional support method, but also have the following significant advantages: fast construction speed, through the combined use of assembled sheet piles and steel piles and advanced construction The method can greatly shorten the construction period and improve the construction efficiency; the cost is low, and advanced equipment such as a small pile driver and an underwater jet robot are used to reduce the construction cost and the requirements for mechanical equipment. The requirements for mechanical equipment are low, and the support structure of the present invention is suitable for various construction sites, and the requirements for mechanical equipment are relatively low, thereby reducing the construction difficulty and cost; the construction noise is small, and advanced construction methods and equipment are used to reduce the impact of construction noise on the surrounding environment, which meets the requirements of green construction; the support effect is good, and through the combination of assembled sheet piles and steel piles, the support structure of the present invention has higher rigidity and stability, and can better cope with various challenges under complex geological conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 It is a schematic diagram of the overall structure of the assembled sheet pile and steel pile combined support structure of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the assembled sheet pile in the present invention;

[0025] Figure 3 A top view of the fabricated sheet pile of the present invention;

[0026] Figure 4 It is a front view of the assembled sheet pile in the present invention;

[0027] Figure 5 It is a left side view of the assembled sheet pile in the present invention;

[0028] Figure 6 It is a schematic diagram of the separation of the soil-resistant panel and the grooved panel in the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of the blade foot of the bottom section of the assembled sheet pile in the present invention;

[0030] Figure 8 This is a schematic diagram of the installation of the assembled sheet pile in the present invention;

[0031] Fig. 9It is a schematic diagram of the installation support state in the present invention;

[0032] Fig.10 It is a schematic diagram of the structure of the assembled sheet pile reinforcement state in the present invention;

[0033] Fig.11 It is a structural schematic diagram of the auxiliary reinforcement body in the present invention;

[0034] Fig.12 It is a structural schematic diagram of the support frame in the present invention;

[0035] Fig.13 It is a schematic diagram of the prestressing tensioning detection of the assembled sheet piles in the present invention.

[0036] In the figure: 1. Earth-resistant panel; 2. Pre-reserved connecting steel bars; 3. Connecting circular groove; 4. Blade foot; 5. Groove plate; 6. Positioning convex groove; 7. Positioning groove; 8. Slide plate; 9. Pre-buried connecting steel pipe; 10. Connecting bolts; 11. Pre-buried nuts; 12. Bolt holes; 13. Connecting steel bars; 14. Steel sheet piles; 15. Prestressed tendons; 16. Tensioning system; 17. Reinforcement material; 18. Support beam assembly; 19. Underwater jet robot; 20. Pumping Water pump; 21. Pile driving system; 22. Limiting stabilizing clamping plate; 23. Auxiliary reinforcement body; 24. Twist control hand wheel; 25. Winding control wheel; 26. First locking clamping hole; 27. Fixed connecting plate; 28. First hook and clamping connecting seat; 29. ​​Support control spring; 30. Lifting control rope; 31. Second hook and clamping connecting seat; 32. Lifting control plate; 33. Clamping support plate; 34. Support frame; 35. Second locking clamping hole. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0038] The present invention is further described below in conjunction with the accompanying drawings.

[0039] Example 1

[0040] like Figure 1-9As shown, a foundation pit assembled sheet pile and steel pile combined support structure and construction method of the present invention include an anti-soil panel 1 and a groove plate 5. The anti-soil panel 1 and the groove plate 5 are quickly assembled by means of a designed slide plate 8 and connecting bolts 10. The anti-soil panel 1 is provided with a reserved connecting steel bar 2 and a pre-buried connecting steel pipe 9 to ensure that the connection between the sheet piles is firm and stable. The anti-soil panel 1 is provided with a limiting convex groove 6 and a limiting groove 7. The groove plate 5 is provided with a bolt hole 12 corresponding to the anti-soil panel 1. The two are quickly connected by connecting bolts 10 and pre-buried nuts 11. A blade foot 4 with a certain inclination is provided under the bottom section of the assembled sheet pile, and the blade foot 4 extends to the slide plate 8 and the lower part of the connecting circular groove 3.

[0041] During the manufacturing stage of the earth-resistant panel 1 and the groove plate 5, relatively long prestressed tendons 15 are embedded, and the exposed part is the connecting steel bar 2. The embedded connecting steel pipe 9 is threadedly connected to the prestressed tendon 15; the earth-resistant panel 1 and the groove plate 5 are cured in accordance with the ultra-high performance concrete curing plan, and after the strength is sufficient, the connecting steel bar 2 and the embedded connecting steel pipe 9 are cut off according to the design requirements.

[0042] A steel pile 14 is provided at the side end of the soil-resistant panel 1, and connecting steel bars 13 are welded at both ends of the steel pile 14. The connecting steel bars 13 are inserted into the connecting circular grooves 3 of the assembled sheet piles to achieve a fast and stable connection between the steel pile and the assembled sheet pile.

[0043] When implementing this embodiment, the earth-resistant panel 1 and the groove plate 5 are quickly assembled through the designed slide plate 8 and connecting bolts 10. The earth-resistant panel 1 is provided with reserved connecting steel bars 2 and embedded connecting steel pipes 9 to ensure that the connection between the sheet piles is firm and stable. The connection structure between the earth-resistant panel 1 and the groove plate 5 is provided with a limiting convex groove 6 and a limiting groove 7 on the earth-resistant panel 1 to ensure precise alignment during the assembly process. The groove plate 5 is provided with a bolt hole 12 corresponding to the earth-resistant panel 1, and the two are quickly connected by connecting bolts 10 and embedded nuts 11. The groove plates 5 can be connected in a similar manner to the anti-earth panel 1 according to the strength requirements. A blade foot 4 with a certain slope is provided at the bottom section of the assembled sheet pile. The blade foot 4 extends to the slide plate 8 and the lower part of the connecting circular groove 3 to reduce the end resistance during installation and limit the relative displacement of the anti-earth panel, the slide plate and the steel sheet pile. In the production process of the assembled sheet pile, firstly, according to the design requirements, a relatively long prestressed tendon 15 is embedded in the production stage of the anti-earth panel 1 and the groove plate 5. The exposed part is the connecting steel bar 2. The embedded connecting steel pipe 9 is threadedly connected to the prestressed tendon 15. The anti-earth panel 1 and the groove plate 5 Follow the ultra-high performance concrete curing program for curing. When the strength is sufficient, cut off the connecting steel bar 2 and the embedded connecting steel pipe 9 according to the design requirements. Connecting steel bars 13 are welded at both ends of the steel pile 14. The connecting steel bars 13 are inserted into the connecting circular groove 3 of the assembled sheet pile to achieve a fast and stable connection between the steel pile and the assembled sheet pile. In the process of making the steel pile 14, first select the appropriate steel material according to the design requirements, and perform cutting, welding and other processing to make the basic shape of the formed steel pile. Then, weld the connecting steel bars 13 at both ends of the steel pile to ensure a firm connection between the connecting steel bars and the steel pile.

[0044] like Fig.13 As shown, the prestressing tensioning of the assembled sheet piles can be tested by the provided tensioning system 16 .

[0045] A construction method for a foundation pit assembled sheet pile and steel pile combined support structure, comprising the following steps:

[0046] S1: First, the soil-resistant panel 1 and the groove plate 5 are connected at the construction site using the connecting bolts 10 and the embedded nuts 11 to realize the assembly of the assembled sheet piles. During the construction process, a small pile driver is first used to drive the bottom section of the assembled sheet pile into the soil layer. As the penetration depth increases, the pile driver cannot continue to drive the assembled sheet bricks. The jet pump robot 19 and the water pump 20 are placed in the assembled sheet pile to clean the soil in the assembled sheet pile and flush it to the blade foot 4. At the same time, the water pump 20 extracts the mud-water mixture, and then the assembled sheet pile is penetrated by cooperating with the pile driving system 21 and the underwater jet robot 19. The jet pump robot 19 and the pile driving system 21 are both existing technologies, and their structural composition will not be repeated;

[0047] S2: After the bottom section of the assembled sheet pile is penetrated, the epoxy resin structural adhesive package is placed in the pre-buried connecting steel pipe 9, and the reserved connecting steel bars 2 of the assembled sheet pile are inserted into the pre-buried connecting steel pipe 9. The epoxy resin structural adhesive package is squeezed and crushed to fill the gap between them, and then the piling process of the piling system 21 and the underwater jet robot 19 is repeated;

[0048] S3: After the installation of the assembled sheet pile is completed, the steel pile 14 is penetrated into the soil by a pile driving machine. During the penetration process, the connecting steel bar 13 of the steel pile 14 needs to be inserted into the connecting circular groove 3 of the assembled sheet pile to ensure that the connecting steel bar and the connecting circular groove are tightly matched;

[0049] S4: The filling and reinforcing material 17 required by the design is poured into the prefabricated sheet pile to enhance the integrity and structural strength of the sheet pile. The filling and reinforcing material ensures the uniformity and density of the filling material during the pouring process to avoid defects such as voids or cracks. The reinforcing material 17 can be concrete or cement-solidified soil. At the same time, a support beam assembly 18 is added to the side end of the groove plate 5 during the foundation pit excavation process.

[0050] Example 2

[0051] On the basis of Example 1, Figure 10-12 As shown, the side ends of the upper and lower assembled groove plates 5 are symmetrically fixed with limited stabilizing clamping plates 22, the limited stabilizing clamping plates 22 arranged on the upper groove plate 5 are located at the lower position of the groove plate 5, the limited stabilizing clamping plates 22 arranged on the bottom groove plate 5 are located at the upper position of the groove plate 5, and the auxiliary reinforcement body 23 is arranged on the groove plate 5 arranged at the upper part;

[0052] The auxiliary reinforcement body 23 includes a screw control hand wheel 24, a winding control wheel 25, a first locking clamping hole 26, a fixed connecting plate 27, a first hook and clamping connection seat 28, a support control spring 29, a lifting control rope 30, a second hook and clamping connection seat 31, a lifting control plate 32, a clamping support plate 33, a support frame 34 and a second locking clamping hole 35. The fixed connecting plate 27 and the first hook and clamping connection seat 28 are distributed on both sides of the support frame 34, and the first hook and clamping connection seat 28 is fixedly connected to the bottom end of the fixed connecting plate 27. The clamping support plates 33 are symmetrically arranged, and the two clamping support plates 33 are respectively located directly below the first hook and clamping connection seat 28. The support control spring 29 is symmetrically clamped. The first locking and fastening holes 35 are evenly penetrated and arranged on both side ends of the support frame 34, and the winding control wheel 25 is rotatably connected to the side ends of the support frame 34, and the middle part of the winding control wheel 24 is fixedly connected to the middle part of the winding control wheel 25, and the first locking and fastening holes 26 are evenly penetrated and arranged on the winding control wheel 25, and the lifting control rope 30 is wound on the winding control wheel 25, and the lifting control plate 32 is fixedly connected to the inner side of the upper end of the fixing support plate 33, and the bottom end of 30 is fixedly connected to the upper end of the lifting control plate 32;

[0053] The first locking clamping hole 26 is adapted to the support frame 34, and the pin body is inserted into the first locking clamping hole 26 and the second locking clamping hole 35 to lock the internal winding control wheel 25 and the support frame 34. The fixed connecting plate 27 and the support frame 34 are fixedly connected to the groove plate 5 by bolts, and the clamping support plate 33 is adapted to the limit stabilization clamping plate 22, and the clamping support plate 33 is slidably clamped inside the limit stabilization clamping plate 22.

[0054] When implementing this embodiment, the auxiliary reinforcement body 23 and the position-limiting stabilizing card plate 22 are arranged between the groove plates 5 used for assembly. The position-limiting stabilizing card plate 22 and the auxiliary reinforcement body 23 are used in combination, so that the groove plates 5 used for assembly and splicing are more secure, and indirectly the assembled groove plates 5 and the steel piles 14 are more secure as a whole. In addition, the auxiliary reinforcement body 23 does not affect the rapid assembly and disassembly of the groove plates 5.

[0055] When the groove plates 5 are spliced ​​and used, the winding control wheels 25 on both sides are driven to rotate by turning the winding control hand wheel 24. At this time, the lifting control rope 30 wound on the winding control wheel 25 is released. At this time, the lifting control rope 30 no longer pulls the lifting control plate 32, and the contracted support control spring 29 is reset. During the reset process of the support control spring 29, the clamping support plate 33 is automatically driven to move downward, so that the clamping support plate 33 is inserted into the limit stabilizing clamping plate 22 set on the groove plate 5 to assist in supporting and reinforcing, thereby making the groove plates 5 used for splicing firm, and the clamping support plate 33 can be controlled to move by turning the winding control hand wheel 24, and the winding control wheel 25 and the support frame 34 are locked by inserting the pin body into the first locking clamping hole 26 and the second locking clamping hole 35, so as to play a role of locking and fixing, and the reinforcement state can be quickly released by turning the winding control hand wheel 24.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foundation pit assembled sheet pile and steel pile combined support structure, characterized in that: The invention comprises an anti-soil panel (1) and a groove plate (5), wherein the anti-soil panel (1) and the groove plate (5) are quickly assembled by means of a designed chute plate (8) and connecting bolts (10), the anti-soil panel (1) is provided with a reserved connecting steel bar (2) and a pre-buried connecting steel pipe (9) for ensuring that the connection between the sheet piles is firm and stable, the anti-soil panel (1) is provided with a limiting convex groove (6) and a limiting groove (7), the groove plate (5) is provided with a bolt hole (12) corresponding to the anti-soil panel (1), and the two are quickly connected by means of connecting bolts (10) and pre-buried nuts (11), and a blade foot (4) with a certain slope is provided under the bottom section of the assembled sheet pile, and the blade foot (4) extends to the lower part of the chute plate (8) and the connecting circular groove (3); During the manufacturing stage of the soil-resistant panel (1) and the grooved panel (5), the prestressed steel bar (15) is embedded, and the exposed part is the reserved connecting steel bar (2). The embedded connecting steel pipe (9) is threadedly connected to the prestressed steel bar (15). The soil-resistant panel (1) and the grooved panel (5) are cured in accordance with the ultra-high performance concrete curing plan. After the strength is sufficient, the reserved connecting steel bar (2) and the embedded connecting steel pipe (9) are cut off according to the design requirements; A steel pile (14) is arranged at the side end of the soil-resistant panel (1), and connecting steel bars (13) are welded to both ends of the steel pile (14). The connecting steel bars (13) are inserted into the connecting circular groove (3) of the assembled sheet pile, so as to realize a quick and stable connection between the steel pile and the assembled sheet pile. The side ends of the upper and lower assembled groove plates (5) are both symmetrically fixed with limit stabilizing clamping plates (22), the limit stabilizing clamping plate (22) arranged on the upper groove plate (5) is located below the groove plate (5), and the limit stabilizing clamping plate (22) arranged on the bottom groove plate (5) is located above the groove plate (5); An auxiliary reinforcement body (23) is provided on the groove plate (5) disposed at the upper portion; The auxiliary reinforcement body (23) comprises a screw control hand wheel (24), a winding control wheel (25), a first locking clamping hole (26), a fixed connecting plate (27), a first hook and clamping connection seat (28), a support control spring (29), a pulling control rope (30), a second hook and clamping connection seat (31), a pulling control plate (32), a clamping support plate (33), a support frame (34) and a second locking clamping hole (35). The fixed connecting plate (27) and the first hook and clamping connection seat (28) are distributed on both sides of the support frame (34), and the first hook and clamping connection seat (28) is fixedly connected to the bottom end of the fixed connecting plate (27). The clamping support plates (33) are symmetrically arranged, and the two clamping support plates (33) are respectively located directly below the first hook and clamping connection seat (28). The support control spring (29) is symmetrically clamped and arranged on the first hook and clamping connection seat (28). The screw control hand wheel (24) is rotatably mounted inside the support frame (34) between a hook-and-clamp connection seat (28) and a second hook-and-clamp connection seat (31) provided at the upper end of the clamp support plate (33). The second locking clamp holes (35) are evenly penetrated and opened at both side ends of the support frame (34). The winding control wheel (25) is rotatably clamped to the side ends of the support frame (34), and the middle part of the screw control hand wheel (24) is fixedly connected to the middle part of the winding control wheel (25). The first locking clamp holes (26) are evenly penetrated and opened on the winding control wheel (25). The pulling control rope (30) is wound on the winding control wheel (25). The pulling control plate (32) is fixedly connected to the inner side of the upper end of the clamp support plate (33), and the bottom end of the pulling control rope (30) is fixedly connected to the upper end of the pulling control plate (32).

2. A foundation pit assembled sheet pile and steel pile combined support structure according to claim 1, characterized in that: The first locking fastening hole (26) is adapted to the support frame (34), and the pin body is inserted into the first locking fastening hole (26) and the second locking fastening hole (35) to lock between the internal winding control wheel (25) and the support frame (34).

3. A foundation pit assembled sheet pile and steel pile combined support structure according to claim 2, characterized in that: The fixed connection plate (27) and the support frame (34) are fixedly connected to the groove plate (5) by means of bolts.

4. A foundation pit assembled sheet pile and profiled steel pile combined support structure according to claim 3, characterized in that: The clamping support plate (33) is adapted to the position-limiting stabilizing clamping plate (22), and the clamping support plate (33) is slidably clamped inside the position-limiting stabilizing clamping plate (22).

5. A construction method of a foundation pit assembled sheet pile and steel pile combined support structure, applicable to a foundation pit assembled sheet pile and steel pile combined support structure according to claim 4, characterized in that: It includes the following steps: S1: At the construction site, the soil-resistant panel (1) and the grooved plate (5) are connected using connecting bolts (10) and embedded nuts (11) to realize the assembly of the assembled sheet piles, the bottom section of the assembled sheet piles is driven into the soil layer using a small pile driver, and the soil inside the assembled sheet piles is cleaned and flushed using an underwater jet robot and a water pump; S2: placing an epoxy resin structural adhesive package into the pre-buried connecting steel pipe (9), inserting the reserved connecting steel bars (2) of the assembled sheet pile into the pre-buried connecting steel pipe (9), and causing the epoxy resin structural adhesive package to be crushed by compression and fill the gap; S3: After the installation of the assembled sheet pile is completed, the steel pile (14) is driven into the soil by a pile driving machine to ensure that the connecting steel bar (13) of the steel pile (14) is tightly matched with the connecting circular groove (3) of the assembled sheet pile; S4: Pour the filling reinforcement material (17) required by the design into the prefabricated sheet pile to enhance the integrity and structural strength of the sheet pile.

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