A combined steel sheet pile structure of an integrated modular assembly house

Abstract

The application relates to a combined steel sheet pile structure of an integrated modular assembly house, which comprises four rectangularly-arranged pile wall, each of which is connected by a supporting beam and a plurality of Z-shaped steel sheet piles, the steel sheet pile is provided with a center tube, a thickness-gradually-changing collapse plate is connected to a broken gap on the upper part of the pile body, the supporting beam is fixedly connected with the center tube through bolts, adjacent pile walls are connected through corner connecting piles, adjacent supporting beams are connected through bases, and connecting screws are arranged on the bases; during construction, the steel sheet piles and the corner connecting piles are first punched into the ground; then the supporting beams are installed, and the steel sheet piles are finally sunk by taking the supporting beams as force transmission members, at this time, the collapse plates are laterally bent and engaged with the soil; finally, the bases are installed to complete final sinking of the corner connecting piles, the application integrates the requirements of steel sheet pile rapid construction and modular building foundation, forms a foundation platform with high integrity, high bearing capacity and convenient connection, and significantly improves construction efficiency and foundation stability.

Description

Technical Field

[0001] This invention relates to the field of civil engineering foundation technology, specifically to a combined steel sheet pile structure for integrated modular prefabricated houses. Background Technology

[0002] Integrated modular prefabricated housing, also known as modular building or prefabricated modular building, is a construction mode in which a house is broken down into several fully functional "three-dimensional spatial module units" in a factory, standardized design, industrialized production, and integrated decoration are carried out on the factory assembly line, and then transported to the construction site and quickly assembled into a complete building like "building blocks".

[0003] When installing integrated modular prefabricated houses, they need to be fixed on the foundation. Existing foundations are generally constructed by trenching, installing steel cages, and pouring concrete. This process is complicated, time-consuming, costly, and requires high on-site construction conditions, which is not conducive to rapid construction and environmentally friendly construction.

[0004] Steel sheet piles are steel profiles with interlocking edges, forming a continuous and robust wall by interlocking multiple individual piles at their edges. They are primarily used for temporary or permanent retaining and water-retaining projects, such as deep foundation pit support, embankment protection, wharves, and underground utility tunnels. Their greatest advantages are rapid construction, adaptability, and reusability. However, traditional steel sheet pile structures have poor vertical bearing capacity, their top structures are unsuitable for directly supporting walls, and the connection methods between piles are limited, making it difficult to form a stable overall foundation. Therefore, they cannot be directly applied to the foundation construction of integrated modular prefabricated houses.

[0005] Therefore, there is an urgent need for a new type of composite structure that can leverage the advantages of steel sheet piles in terms of fast construction speed and strong adaptability, while also meeting the load-bearing and connection requirements of modular building foundations. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a combined steel sheet pile structure for integrated modular prefabricated housing.

[0007] This invention is achieved through the following technical solution: providing a combined steel sheet pile structure for integrated modular prefabricated houses, including four rectangularly arranged sheet pile walls. Each sheet pile wall includes a horizontally arranged support beam and multiple sheet piles connected in sequence. Each sheet pile includes a middle plate and wing plates fixed to both ends of the middle plate. Locking plates are fixed to the edges of the wing plates. The two wing plates and the middle plate form a Z-shaped structure. A central tube is fixed to the middle of the middle plate. A blocking plate is fixed to the lower end of the central tube. The sheet pile is provided with a break notch, and multiple collapse plates are connected to the break notch.

[0008] The upper end of the central tube is provided with internal threads, and the support beam is fixedly connected to the upper end of the central tube by fixing bolts; corner connecting piles are connected between the steel sheet piles of adjacent pile-plate walls, and bases are bolted between the support beams of adjacent pile-plate walls, with connecting screws fixedly connected to the bases.

[0009] As an optimization, the height of the break is 15-30cm, the height of the sheet pile below the break is 30-60cm, and the height of the sheet pile above the break is 100-300cm. This design, by limiting the height range of the break and its upper and lower portions, ensures that the sheet piles have a reasonable range of flexible deformation and sufficient anchorage length during pile driving. This guarantees that the collapse plate effectively performs its interlocking function, ensures that the lower part of the pile is stably anchored into the soil, and leaves sufficient connection height at the top.

[0010] As an optimization, two shrinkage plates are connected between the intermediate plates of the disconnected notch, and two shrinkage plates are connected between the wing plates of the disconnected notch. This scheme sets two shrinkage plates at both the intermediate plate and the wing plate of the disconnected notch, so that the pile body forms a multi-point controllable deformation zone in the horizontal direction, which can more evenly mesh with the surrounding soil during pile driving, and enhance the side friction resistance and pull-out resistance.

[0011] As an optimization, the thickness of the collapsible plate gradually decreases from both ends towards the middle. The collapsible plate in this design adopts a gradually decreasing thickness design, which is thinner in the middle and thicker at both ends. This makes it easier for it to undergo the expected bending deformation when subjected to soil compression, avoiding stress concentration that could lead to fracture, and improving the interlocking reliability and structural durability.

[0012] As an optimization, the support beam includes a top plate and a bottom plate arranged side by side, and at least two vertical plates connecting the top and bottom plates. The bottom plate has connecting holes, and the top plate has corresponding installation holes. Fixing bolts pass through the connecting holes and are threaded to the upper end of the central tube. In this design, the support beam adopts a box-shaped structure composed of a top plate, a bottom plate, and vertical plates, and is equipped with connecting holes and installation holes. This enhances the beam's bending stiffness and force transmission efficiency, and facilitates the installation of fixing bolts and the transmission of impact during pile driving.

[0013] As an optimization, the base includes a horizontal base plate and four protruding plates evenly distributed and fixed to the lower end of the base plate along the circumference. Connecting screws are fixed to the base plate. Pads are fixed to the upper surfaces of both ends of the base plate. Clearance openings are provided at both ends of the top plate. The protruding plates and pads are connected vertically by bolts. This design, through the cooperative connection of the base plate, protruding plates, and pads, achieves a stable mechanical connection between the base and the support beam. Simultaneously, the connecting screws provide a standardized interface for the upper modular housing, improving installation accuracy and efficiency.

[0014] As an optimization, a pressure block is fixed to the lower end of the anchor plate, located below the protruding plate. In this design, the pressure block at the lower end of the anchor plate increases the contact area and compressive stress between the base and the foundation soil, further preventing the base from settling or shifting, and improving the overall stability of the corner area.

[0015] As an optimization, the corner connecting pile includes a central column and four corner plates evenly distributed around the central column. The edges of the corner plates are fixed with corner locking plates that are compatible with the locking plates. The corner connecting pile adopts a structure of a central column and four corner plates, realizing a multi-directional interlocking connection between adjacent pile-slab walls at the corner, ensuring the continuity and overall rigidity of the foundation in the corner area.

[0016] As an optimization, the two interlocking plates of the sheet pile are evenly distributed along the circumference of the central tube, and the four corner interlocking plates of the corner connection pile are evenly distributed along the circumference of the central column. The even distribution of the interlocking plates and corner interlocking plates along the circumference of the central tube or central column ensures symmetrical force distribution and accurate alignment during connection, facilitates construction and installation, and improves the uniformity of load bearing and versatility of the connection node.

[0017] As an optimization, during construction, sheet piles and corner connecting piles are first inserted into the ground using a pile driver, ensuring the upper ends of the sheet piles and corner connecting piles are 15-30cm above ground level. During insertion, a pile driver is inserted into the central tube, and the pile driver strikes the upper end of the pile driver. The lower end of the pile driver pushes the blocking plate at the lower end of the central tube downwards, thus inserting the sheet pile. The pile driver is then pulled out. Next, a support beam is installed, and the pile driver strikes the upper end of the support beam to insert all the sheet piles into the ground. The collapsible plates bend laterally to achieve interlocking with the soil. Finally, the base is placed on the corner connecting piles, and the pile driver strikes the base to insert all the corner connecting piles into the ground. When the upper end of the base is flush with the support beam, bolts are used to connect the base to the adjacent support beam. This scheme clearly defines the phased pile driving and installation construction process, providing a standardized and operable construction method. It protects the pile top structure and utilizes the support beam and base as force transmission tools, ensuring the interlocking effect of the collapsible plates and overall elevation control, thus improving construction quality and efficiency.

[0018] The beneficial effects of this invention are as follows: The integrated modular prefabricated house combined steel sheet pile structure combines the advantages of rapid steel sheet pile construction with the load-bearing stability required for modular building foundations. Through the coordinated design of Z-shaped steel sheet piles, central pipes, support beams, and corner connecting piles, a foundation frame with strong integrity and high vertical bearing capacity is formed. Its construction process eliminates the need for excavation and concrete curing, significantly improving efficiency. The unique collapsible plate structure allows for tight interlocking with the soil during piling, enhancing anchoring force. All connections utilize standardized mechanical connections, ensuring reliability and convenience, guaranteeing both foundation stability and facilitating the rapid installation and alignment of the upper modular house. Furthermore, this structure is highly adaptable, adjustable, and recyclable, achieving a balance between high efficiency, economy, and green construction. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a top view of the present invention;

[0021] Figure 3 This is a front view of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the present invention without the base installed;

[0023] Figure 5 This is a top view of the invention without the base installed;

[0024] Figure 6 This is a front view of the invention without the base installed;

[0025] Figure 7 This is a schematic diagram of the structure of the present invention without the support beam installed;

[0026] Figure 8 This is a top view of the present invention without the support beam installed;

[0027] Figure 9 This is a schematic diagram of the structure of the pile-slab wall of the present invention;

[0028] Figure 10 This is an exploded view of the pile-slab wall of the present invention;

[0029] Figure 11 This is a schematic diagram of the steel sheet pile of the present invention;

[0030] Figure 12 This is a front view of the steel sheet pile of the present invention;

[0031] Figure 13 This is a top view of the steel sheet pile of the present invention;

[0032] Figure 14 This is a schematic diagram of the corner connection pile of the present invention;

[0033] Figure 15 This is a top view of the corner connection pile of the present invention;

[0034] Figure 16 This is a schematic diagram of the supporting beam of the present invention;

[0035] Figure 17 This is a top view of the support beam of the present invention;

[0036] Figure 18 For the present invention Figure 17 Sectional view of plane AA;

[0037] Figure 19 This is a schematic diagram of the structure of the base of the present invention;

[0038] Figure 20 This is a schematic diagram of the base of the present invention from another angle;

[0039] Figure 21 This is a top view of the steel sheet pile arrangement for the grid foundation of this invention;

[0040] As shown in the figure:

[0041] 1. Sheet pile, 2. Corner connecting pile, 3. Support beam, 4. Base, 5. Fixing bolt, 6. Piling rod, 11. Center tube, 12. Intermediate plate, 13. Wing plate, 14. Locking plate, 15. Blocking plate, 16. Collapse plate, 21. Center column, 22. Corner plate, 23. Corner locking plate, 31. Top plate, 32. Bottom plate, 33. Vertical plate, 34. Connecting hole, 35. Installation process hole, 36. Pad, 41. Anchor plate, 42. Connecting bolt, 43. Protruding plate, 44. Pressure block. Detailed Implementation

[0042] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0043] like Figures 1-21 As shown, the present invention provides a combined steel sheet pile structure for an integrated modular prefabricated house, comprising four sheet pile walls arranged in a rectangle, corner connecting piles 2 connecting adjacent sheet pile walls, and bases 4 connecting the ends of adjacent support beams 3, which together form a complete closed foundation frame.

[0044] Each sheet wall is formed by multiple sheet piles 1 interlocking with each other through interlocking plates 14 at their edges to form a continuous wall. For example... Figure 11-13As shown, the sheet pile 1 adopts a Z-shaped cross-section structure, consisting of a vertical intermediate plate 12 and horizontal flanges 13 fixed at both ends. The two flanges 13 extend in opposite directions, forming a stable Z-shaped structure together with the intermediate plate 12. Each flange 13 has an integrally formed or welded interlocking plate 14 on its outer edge, and the two interlocking plates 14 are evenly distributed circumferentially at 180 degrees about the central tube 11. The central tube 11 is fixed to the middle of the intermediate plate 12, with a blocking plate 15 welded inside its lower end and internal threads machined at its upper end. A notch is provided at the lower part of the sheet pile 1, dividing the pile vertically into upper and lower sections. Specifically, the height of the notch itself is designed to be 15-30 cm, the lower pile height is 30-60 cm to provide initial anchorage, and the upper pile height is 100-300 cm to accommodate different load-bearing requirements. At this break, two collapsible plates 16 connect the two parts of the separated intermediate plate 12. At the same time, two collapsible plates 16 also connect the two parts of the separated wing plate 13 on each side. The thickness of these collapsible plates 16 is specially designed to present a variable cross-section shape that gradually decreases from the top and bottom ends to the middle, making it easier for them to undergo controllable bending plastic deformation from the middle under lateral earth pressure, thereby achieving tight interlocking with the soil.

[0045] Because of the structure of the collapse plate 16, the bearing capacity of the sheet pile is improved, thus enabling it to support integrated modular prefabricated houses. Therefore, the height of the sheet pile in this invention does not need to be particularly high.

[0046] The sheet pile 1 adopts a Z-shaped cross-section structure, which has strong bearing capacity and good versatility. Each sheet pile 1 in the pile-slab wall is arranged in an array, and the interlocking plate 14 and the central tube 11 are arranged in a straight line, which facilitates the connection of the support beam 3.

[0047] At the four corners of the foundation, corner connecting piles 2 are installed to reliably connect adjacent sheet pile walls in two vertical directions. Each corner connecting pile 2 includes a central column 21 and four corner plates 22 evenly distributed radially around it. Each corner plate 22 has a corner locking plate 23 fixed to its edge. The four corner locking plates 23 are evenly distributed around the central column 21, and their shape is adapted to the locking plates 14 of the sheet piles 1, allowing for precise engagement and locking with the locking plates 14 of the sheet piles 1 from two vertical directions simultaneously. When the foundation is a U-shaped structure, adjacent corner plates 22 of the corner connecting pile 2 connect to two sheet pile walls respectively. When the foundation is a grid-shaped structure (e.g., ...), ... Figure 21 As shown in the figure, the four corner plates 22 of the central corner connecting pile 2 are respectively connected to the four pile plate walls.

[0048] Support beam 3 is horizontally installed at the top of the sheet pile wall to connect and level all sheet piles 1 in the same row and to evenly distribute the upper load. Its structure is a box girder, such as... Figure 16-18As shown, the structure includes a top plate 31 and a bottom plate 32 arranged parallel to each other, and at least two vertical plates 33 connecting the top plate 31 and the bottom plate 32. In this embodiment, there are two vertical plates 33. A connecting hole 34 is provided on the bottom plate 32 corresponding to the position of the central tube 11 of each sheet pile 1, and a larger diameter installation process hole 35 is provided on the top plate 31 at the corresponding position. The installation process hole 35 corresponds vertically to the connecting hole 34. During installation, the fixing bolt 5 passes through the connecting hole 34 and the installation process hole 35 in sequence, and finally screws into the internal thread at the upper end of the central tube 11, achieving a rigid connection between the support beam 3 and the sheet pile 1.

[0049] The supporting beams 3 of adjacent pile-slab walls are connected by bases 4. For example... Figure 19 , 20 As shown, the base 4 includes a horizontal foot plate 41, on the lower surface of which four protruding plates 43 are evenly fixed along the circumference. A connecting bolt 42 is vertically fixed to the foot plate 41 for connection to the base plate of the upper modular house. To achieve connection with the base, pads 36 are fixed to the upper surfaces of both ends of the base plate 32 of the support beam 3, and clearance openings are correspondingly provided at both ends of the top plate 31. During installation, the protruding plates 43 of the base 4 are connected vertically to the pads 36 at the ends of the support beam 3 using bolts. To further enhance the anti-settlement capability and overall stability of the base 4 after installation, a pressure block 44 located below the protruding plates 43 is also fixed to the lower end of the foot plate 41. After installation, the pressure block 44 compacts the foundation below.

[0050] The construction method of this invention is as follows:

[0051] Preliminary piling: Using a piling machine, first insert the sheet pile 1 and the corner connecting pile 2 into the predetermined underground positions. During insertion, ensure that the upper ends of both the sheet pile 1 and the corner connecting pile 2 are 15-30cm above the ground. For the sheet pile 1, before piling, insert the piling rod 6 into its central tube 11. The hammer of the piling machine strikes the upper end of the piling rod 6, and the impact force is transmitted through the piling rod 6 to the blocking plate 15 at the lower end of the central tube 11. This pulls the sheet pile 1 into the soil through the downward pull of the entire lower end of the sheet pile 1. During this process, the collapsible plate 16 is under tension and therefore will not deform or bend. After completion, pull out the piling rod 6. At this point, the sheet pile 1 is in the following state: Figure 7 , 8 As shown.

[0052] Install the support beam and finalize the piles: Place the support beam 3 on top of all the sheet piles 1 and secure it with fixing bolts 5. Then, use a pile driver to directly hammer the upper end of the support beam 3. The impact force is evenly transmitted to all the sheet piles 1 through the support beam 3, driving them completely into the design elevation. During this process, due to the resistance at the lower end of the sheet piles 1, the collapsible plate 16 at the break in the sheet pile 1 bends and deforms laterally, forming a tight mechanical interlock with the surrounding soil, significantly increasing the pile resistance. At this point, the state is as follows: Figure 4 , 5As shown in Figure 6.

[0053] Install the base and complete the corner piles: Place the base 4 on top of the partially exposed corner connecting pile 2. Use a pile driver to hammer the base plate 41 of the base 4, driving the corner connecting pile 2 completely into the design elevation. When the upper surface of the base 4 is flush with the top surface of the adjacent support beam 3, use bolts to firmly connect the protruding plate 43 of the base 4 to the pad 36 at the end of the support beam 3. At this point, the four pile-plate walls are connected by the support beam 3 and the base 4 to form a solid and stable integral foundation platform, as shown in the image. Figure 1 , 2 As shown in Figure 3.

[0054] Installation of the superstructure: The prefabricated modules of the integrated modular house can be quickly connected and fixed to the connecting screws 42 extending from the base 4 through the connectors at the bottom, thus completing the installation of the house, and the prefabricated modules are supported on the support beams 3.

[0055] Of course, the above description is not limited to the examples above. Technical features not described in this invention can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solutions of this invention and are not intended to limit this invention. This invention has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this invention do not depart from the spirit of this invention and should also fall within the scope of protection of the claims of this invention.

Claims

1. A combined steel sheet pile structure for integrated modular prefabricated housing, characterized in that: The structure includes four rectangularly arranged sheet walls, each sheet wall comprising a horizontally arranged support beam (3) and a plurality of sheet piles (1) connected in sequence. Each sheet pile (1) includes a middle plate (12) and wing plates (13) fixed to both ends of the middle plate (12). The edges of the wing plates (13) are fixed with locking plates (14). The two wing plates (13) and the middle plate (12) form a Z-shaped structure. A central tube (11) is fixed to the middle of the middle plate (12). A blocking plate (15) is fixed to the interior of the lower end of the central tube (11). The sheet pile (1) is provided with a break notch, and a plurality of collapse plates (16) are connected to the break notch. The upper end of the central tube (11) is provided with an internal thread, and the support beam (3) is fixed to the upper end of the central tube (11) by a fixing bolt (5); An angle connecting pile (2) is connected between the sheet piles (1) of adjacent sheet walls, and a base (4) is bolted between the supporting beams (3) of adjacent sheet walls, and a connecting screw (42) is fixed on the base (4).

2. The combined steel sheet pile structure for an integrated modular prefabricated house according to claim 1, characterized in that: The height of the break is 15-30cm, the height of the sheet pile (1) below the break is 30-60cm, and the height of the sheet pile (1) above the break is 100-300cm.

3. The combined steel sheet pile structure for an integrated modular prefabricated house according to claim 1, characterized in that: Two collapsible plates (16) are connected between the intermediate plates (12) of the disconnected opening, and two collapsible plates (16) are connected between the wing plates (13) of the disconnected opening.

4. The combined steel sheet pile structure for an integrated modular prefabricated house according to claim 1, characterized in that: The thickness of the collapse plate (16) gradually decreases from the top and bottom ends toward the middle.

5. The combined steel sheet pile structure for an integrated modular prefabricated house according to claim 1, characterized in that: The support beam (3) includes a top plate (31) and a bottom plate (32) arranged side by side, and at least two vertical plates (33) connected between the top plate (31) and the bottom plate (32). The bottom plate (32) has a connecting hole (34), and the top plate (31) has an installation process hole (35) corresponding to the connecting hole (34). The fixing bolt (5) passes through the connecting hole (34) and is threaded to the upper end of the central tube (11).

6. The combined steel sheet pile structure for an integrated modular prefabricated house according to claim 5, characterized in that: The base (4) includes a horizontal base plate (41) and four protruding plates (43) evenly distributed and fixed to the lower end of the base plate (41) along the circumference. A connecting screw (42) is fixed to the base plate (41). A pad (36) is fixed to the upper surface of both ends of the bottom plate (32). Both ends of the top plate (31) have clearance openings. The protruding plates (43) and the pads (36) are connected vertically by bolts.

7. The combined steel sheet pile structure for an integrated modular prefabricated house according to claim 6, characterized in that: The lower end of the footplate (41) is fixed to a pressure block (44) located below the protruding plate (43).

8. The combined steel sheet pile structure for an integrated modular prefabricated house according to claim 1, characterized in that: The corner connecting pile (2) includes a central column (21) and four corner plates (22) evenly distributed around the central column (21). The edges of the corner plates (22) are fixed with corner locking plates (23) that are adapted to the locking plates (14).

9. The combined steel sheet pile structure for an integrated modular prefabricated house according to claim 8, characterized in that: The two locking plates (14) of the sheet pile (1) are evenly distributed around the central tube (11), and the four corner locking plates (23) of the corner connecting pile (2) are evenly distributed around the central column (21).

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