Full-recovery supporting structure with scaffold function and construction method

Abstract

The invention provides a full-recycling supporting structure with a scaffold function and a construction method, and belongs to the technical field of building foundation pits, the full-recycling supporting structure comprises steel plate supporting row piles, a first row of profile steel supporting row piles, a second row of profile steel supporting row piles and an outer wall construction scaffold, the first-row profile steel supporting row piles comprise a plurality of first H-shaped steel, the secondary-row profile steel supporting row piles comprise a plurality of second H-shaped steel, the outer wall construction scaffold comprises longitudinal horizontal rods, transverse horizontal rods and scaffold boards, the longitudinal horizontal rods are fixedly connected with the first H-shaped steel and the second H-shaped steel through first connecting pieces, and the transverse horizontal rods are fixedly connected with the second H-shaped steel through second connecting pieces. The transverse horizontal rod is fixedly connected with the longitudinal horizontal rod through a second connecting piece, and the scaffold board is fixedly arranged on the transverse horizontal rod. According to the full-recovery supporting structure, the rigidity is improved, the application depth of the foundation pit is widened, the utilization rate of the structure space is improved, and the material cost and the environmental burden are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of building foundation pits, and specifically relates to a fully recoverable support structure with scaffolding function and a construction method thereof. Background Technique

[0002] Foundation pit support is a retaining, strengthening and protection measure for the foundation pit side wall and the surrounding environment to ensure the safety of underground structure construction and the surrounding environment of the foundation pit. Common foundation pit support forms mainly include row pile support, diaphragm wall support, cement retaining wall, steel sheet pile, soil nail wall, in-pit support or a combination of two or more of them.

[0003] In recent years, the fully recoverable support structure for foundation pits has developed rapidly and has become one of the important directions and symbols for the high-quality development of foundation pit projects. Steel sheet piles and composite steel piles of steel sheet piles and H-shaped steel are typical fully recoverable support structures. Since the steel sheet pile support structure often causes excessive deformation due to insufficient stiffness when the excavation depth increases, which affects the stability of the foundation pit. To improve the flexural stiffness and anti-deformation ability of the support structure, the HLC-shaped steel support structure came into being, significantly enhancing the stability of the support structure. However, under greater excavation depths and more complex soil conditions, especially during the construction of the basement exterior wall, the stiffness and bearing capacity of the HLC-shaped steel support structure may still be insufficient; in addition, during the construction of the basement exterior wall, it is usually necessary to build a scaffolding within a range of 1 - 1.5 meters inside the foundation pit support structure to facilitate the construction operation of the staff. However, the foundation pit support structure and the scaffolding usually exist as two independent systems. The foundation pit support structure is mainly used to support the soil and prevent the foundation pit from collapsing, and the scaffolding is used as an operation platform during the construction of the basement exterior wall. There is a lack of effective integration between the foundation pit support structure and the scaffolding, which not only increases the construction complexity but also causes waste of some space and resources; moreover, concrete piles are commonly used in the construction of the basement exterior wall, and concrete piles cannot be recycled after construction and can only be treated as waste after demolition, which seriously increases the resource consumption and waste treatment cost.

[0004] Therefore, we propose a fully recoverable support structure with scaffolding function and a construction method thereof. Summary of the Invention

[0005] The purpose of the present invention is to provide a fully recoverable support structure with scaffolding function and a construction method thereof to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions: The present invention provides a fully recoverable support structure with a scaffolding function, including a steel plate support row pile, a first row of steel section support row piles, a second row of steel section support row piles, and an exterior wall construction scaffolding. The steel plate support row pile includes a plurality of steel sheet piles, and the steel sheet piles are sequentially connected end to end in a bite manner. The first row of steel section support row piles is arranged on one side of the steel plate support row pile. The first row of steel section support row piles includes a plurality of first H-shaped steels, and the first H-shaped steels are arranged at intervals. The second row of steel section support row piles is arranged on the side of the first row of steel section support row piles away from the steel plate support row pile. The second row of steel section support row piles is arranged at intervals with the first row of steel section support row piles. The second row of steel section support row piles includes a plurality of second H-shaped steels, and the second H-shaped steels are arranged at intervals. And each second H-shaped steel is arranged opposite to the corresponding first H-shaped steel. The exterior wall construction scaffolding includes longitudinal horizontal bars, transverse horizontal bars, and scaffold boards. The longitudinal horizontal bars are fixedly connected to the first H-shaped steels and the second H-shaped steels through first connectors. The transverse horizontal bars are fixedly connected to the longitudinal horizontal bars through second connectors. The scaffold boards are fixedly arranged on the transverse horizontal bars.

[0007] Further, both the longitudinal horizontal bars and the transverse horizontal bars are steel pipes with a diameter of φ48.3×3.6.

[0008] Further, the transverse horizontal bars at the bottom of the fully recoverable support structure are arranged below the longitudinal horizontal bars. Except for the transverse horizontal bars at the bottom of the fully recoverable support structure, the transverse horizontal bars at other positions are arranged above the longitudinal horizontal bars.

[0009] Further, the first connector includes a first steel sleeve and a bolt. The first steel sleeve includes an upper half steel sleeve and a lower half steel sleeve. One side of the upper half steel sleeve is rotatably connected to one side of the lower half steel sleeve. On the other side of the upper half steel sleeve and the other side of the lower half steel sleeve, first fixing plates are fixedly provided. On the side where the first steel sleeve is rotatably connected, a first connecting pipe is fixedly provided. On the side of the first connecting pipe away from the first steel sleeve, a first connecting plate is fixedly provided. Bolt holes are formed on both the first connecting plate and the first fixing plate, and the bolt is matched with the bolt hole.

[0010] Furthermore, the second connecting member includes a second steel sleeve and a bolt, the second steel sleeve includes an upper steel sleeve and a lower steel sleeve, one side of the upper steel sleeve and one side of the lower steel sleeve are rotatably connected, the other side of the upper steel sleeve and the other side of the lower steel sleeve are fixed with a second fixing plate, the side of the second steel sleeve where the second steel sleeve is rotatably connected is fixed with a second connecting pipe, the side of the second connecting pipe away from the second steel sleeve is fixed with a third connecting pipe, the third connecting pipe is perpendicularly arranged to the second connecting pipe, the side of the third connecting pipe away from the second connecting pipe is fixed with a third steel sleeve, the structure of the third steel sleeve is the same as that of the second steel sleeve, the third steel sleeve is perpendicularly arranged to the second steel sleeve, the side of the third steel sleeve away from the third connecting pipe is fixed with a third fixing plate, the third fixing plate and the second fixing plate are both provided with bolt holes, and the bolts match the bolt holes.

[0011] The present invention also provides a construction method of a fully recyclable support structure with scaffolding function, comprising the following steps: S1: Preparation before construction: clean the site, level the ground, mark the location of the foundation pit and the fully recoverable support structure; S2: Foundation pit layout and underground facility detection: Lay out the foundation pit location, confirm the scope of the foundation pit, and use equipment to check surrounding facilities; S3: Insert steel sheet support piles: Drive steel sheet piles in sequence according to the designed depth, and monitor the verticality and depth of the steel sheet piles in real time during the construction process; S4: Insert the first row of steel support piles: insert the first H-beam in sequence according to the designed depth, and monitor the verticality, depth and spacing of the first H-beam in real time during the construction process; S5: Insert the second row of steel support piles: insert the second H-beam in sequence according to the designed depth, and monitor the verticality, depth and spacing of the second H-beam in real time during the construction process; S6: Build the exterior wall construction scaffolding: Use the first H-shaped steel and the second H-shaped steel as the supporting vertical poles of the exterior wall construction scaffolding, detachably fix the longitudinal horizontal poles on the first H-shaped steel and the second H-shaped steel according to the designed position, detachably fix the transverse horizontal poles on the longitudinal horizontal poles according to the designed position, and detachably fix the scaffolding boards on the transverse horizontal poles according to the designed position.

[0012] Furthermore, step S6 specifically includes: S61: Scaffolding design and preparation: Confirm the scaffolding design, prepare the required materials, and then check the material quality and equipment used. After the foundation pit is excavated, install the longitudinal horizontal bars, transverse horizontal bars and scaffolding boards in order from bottom to top; S62: Install the longitudinal horizontal rod: Locate the installation position of the longitudinal horizontal rod, hoist the longitudinal horizontal rod to the designed position, and then install the longitudinal horizontal rod on the first H-beam and the second H-beam in sequence. After the installation is completed, check the horizontality of the longitudinal horizontal rod; S63: Install the transverse horizontal bars: Lay out the lines to determine the installation positions of the transverse horizontal bars, hoist the transverse horizontal bars to the designed positions, and then install the transverse horizontal bars on the longitudinal horizontal bars in sequence. After installation, check the levelness of the transverse horizontal bars. S64: Laying scaffolding boards: Lay the scaffolding boards on the horizontal bars and then reinforce the joints.

[0013] Compared with the prior art, the present invention has the following technical effects: The fully recyclable support structure and construction method with scaffolding function provided by the present invention combine steel sheet piles, H-shaped steel and exterior wall construction scaffolding, and construct a sharing mechanism with the fully recyclable scaffolding, so that the fully recyclable support structure has the function of scaffolding, and the exterior wall construction scaffolding adopts a new type of connecting parts to ensure the stability, safety and sustainability of the exterior wall construction scaffolding during the construction of the basement exterior wall. The fully recyclable support structure has improved rigidity, broadened the application depth of the foundation pit of the fully recyclable support structure, and can support a larger foundation pit excavation depth, increase the proportion of fully recyclable standard components in the building, and reduce deformation caused by soil pressure; furthermore, the steel sheet piles, H-shaped steel and exterior wall construction scaffolding are effectively integrated, which can make full use of limited construction space, improve the utilization rate of structural space, avoid resource waste, and improve construction efficiency; in addition, the fully recyclable support structure can be recycled and reused, and the steel can be reused after the construction is completed, which reduces material costs and environmental burden. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the fully recoverable support structure according to an embodiment of the present invention; Figure 2 This is a schematic top view of a fully recyclable support structure according to an embodiment of the present invention; Figure 3 This is a structural schematic diagram of the top of the fully recoverable support structure according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the connection of the second connecting piece, the longitudinal horizontal rod, and the transverse horizontal rod at positions other than the bottom of the fully recyclable support structure according to an embodiment of the present invention; Figure 5 This is a structural schematic diagram of the bottom of the fully recoverable support structure according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the connection between the longitudinal horizontal rod, the first connecting member, and the second H-shaped steel according to an embodiment of the present invention; Figure 7This is a schematic diagram of the connection between the second connector, the longitudinal horizontal rod, and the transverse horizontal rod at the bottom of the fully recyclable support structure according to an embodiment of the present invention; Figure 8 This is a schematic structural diagram of a first connecting member according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the connection between the first connecting pipe and the first steel sleeve of the first connecting member according to an embodiment of the present invention; Figure 10 This is a schematic structural diagram of a second connecting member according to an embodiment of the present invention; Figure 11 This is a schematic diagram of the connection between the second connecting pipe and the third connecting pipe of the second connecting member according to an embodiment of the present invention.

[0015] In the figure: 1. Steel plate support piles, 11. Steel sheet piles, 2. First row of steel support piles, 21. First H-shaped steel, 3. Second row of steel support piles, 31. Second H-shaped steel, 4. External wall construction scaffolding, 41. Longitudinal horizontal rod, 42. Transverse horizontal rod, 43. First connecting piece, 431. First steel sleeve, 4311. Upper half steel sleeve, 4312. Lower half steel sleeve, 432. First fixing plate, 433. First connecting pipe, 434. First connecting plate, 435. Bolt, 44. Second connecting piece, 441. Second steel sleeve, 442. Second fixing plate, 443. Second connecting pipe, 444. Third connecting pipe, 445. Third steel sleeve, 446. Third fixing plate, 45. Scaffolding board. DETAILED DESCRIPTION

[0016] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention. In this article, terms such as "left, right, up, down, front, and back" are established based on the positional relationships shown in the drawings. Depending on the different drawings, the corresponding positional relationships may also change accordingly. Therefore, they cannot be understood as absolute limitations on the scope of protection.

[0017] See also Figures 1 to 11 This embodiment provides a fully recyclable support structure with scaffolding function, including a steel plate support pile row 1, a first row of steel support piles 2, a second row of steel support piles 3 and an external wall construction scaffold 4. The steel plate support pile row 1 includes a plurality of steel sheet piles 11 vertically driven into the soil, and the steel sheet piles 11 are sequentially engaged end to end, such as Figure 2 As shown, the steel sheet piles 11 with openings facing the same direction are spaced apart along the longitudinal direction of the foundation pit, and the spacing distance is recorded as R. In this embodiment, the longitudinal direction of the foundation pit isFigure 2 The first row of steel support piles 2 is set on one side of the steel sheet support piles 1. The first row of steel support piles 2 includes a plurality of first H-shaped steels 21 vertically driven into the soil. The first H-shaped steels 21 are set on the inner side of the steel sheet piles 11 and are spaced apart along the longitudinal direction of the foundation pit. The spacing is recorded as 2R.

[0018] Specifically, the secondary row of steel support piles 3 is arranged on the side of the primary row of steel support piles 2 away from the steel plate support piles 1. Figure 2 As shown, the second row of steel support piles 3 and the first row of steel support piles 2 are spaced apart in the transverse direction of the foundation pit, and the spacing distance is recorded as D, which ranges from 500 to 600 mm, that is, the distance between the first H-shaped steel 21 and the second H-shaped steel 31 in the transverse direction of the foundation pit. Figure 2 The secondary steel support pile row 3 includes a plurality of second H-shaped steels 31 vertically driven into the soil. The second H-shaped steels 31 are spaced apart along the longitudinal direction of the foundation pit at a spacing of 2R, and each second H-shaped steel 31 is arranged opposite to the corresponding first H-shaped steel 21.

[0019] Specifically, the exterior wall construction scaffolding 4 includes longitudinal horizontal bars 41, transverse horizontal bars 42, and scaffolding boards 45. Both the longitudinal horizontal bars 41 and the transverse horizontal bars 42 are made of φ48.3×3.6 steel pipes. The longitudinal horizontal bars 41 are detachably fixedly connected to the first H-beam 21 and the second H-beam 31 via first connectors 43. The longitudinal horizontal bars 41 are mounted on the end of the first H-beam 21 away from the steel plate support piles 1, and the longitudinal horizontal bars 41 are mounted on the end of the second H-beam 31 away from the first row of steel support piles 2. The distance A between the longitudinal horizontal bars 41 mounted on the first H-beam 21 and the longitudinal horizontal bars 41 mounted on the second H-beam 31 along the transverse direction of the foundation pit is . The longitudinal horizontal bars 41 are composed of several middle longitudinal horizontal bars and two end longitudinal horizontal bars. The middle portion of the longitudinal horizontal bars 41 is fixedly connected in sequence by several middle longitudinal horizontal bars. The two end longitudinal horizontal bars are located at either end of the longitudinal horizontal bar 41, and the end longitudinal horizontal bars are fixedly connected to the middle longitudinal horizontal bars. The number of the middle longitudinal horizontal bars needs to be determined by the construction personnel according to the actual construction conditions. The length of the middle longitudinal horizontal bar is generally 6R, and the length of the end longitudinal horizontal bar is 6R+ B+C, B is the flange width of the first H-beam 21 and the second H-beam 31, C is the length of the end longitudinal horizontal rod extending out of the H-beam away from the middle longitudinal connecting rod, and C must meet C≥300mm.

[0020] Specifically, the transverse horizontal rod 42 is detachably fixedly connected to the longitudinal horizontal rod 41 through a second connecting piece 44. The transverse horizontal rod 42 at the bottom of the fully recyclable support structure is set below the longitudinal horizontal rod 41 as a sweeping rod. Except for the transverse horizontal rod 42 at the bottom of the fully recyclable support structure, the transverse horizontal rods 42 at other positions are all set above the longitudinal horizontal rod 41. The flange thickness of the first H-shaped steel 21 and the second H-shaped steel 31 is Indicates that the length of the horizontal rod 42 is D+ +2E, where E is the length of one end of the horizontal bar 42 extending beyond the H-beam. E ≥ 300mm. The horizontal bars 42 are mounted on either side of the first H-beam 21 and the second H-beam 31, with a spacing of 2R between adjacent horizontal bars 42. The scaffolding boards 45 are removably fixed to the horizontal bars 42.

[0021] Specifically, the first connecting member 43 includes a first steel sleeve 431 and a bolt 435. The first steel sleeve 431 includes an upper steel sleeve 4311 and a lower steel sleeve 4312. One side of the upper steel sleeve 4311 and one side of the lower steel sleeve 4312 are rotatably connected. The other side of the upper steel sleeve 4311 and the other side of the lower steel sleeve 4312 are both fixed with a first fixing plate 432. The first connecting pipe 433 is fixed on the side of the first steel sleeve 431 where it is rotatably connected. The first connecting plate 434 is fixed on the side of the first connecting pipe 433 away from the first steel sleeve 431. Bolt holes are provided on the first connecting plate 434 and the first fixing plate 432, and the bolts 435 cooperate with the bolt holes.

[0022] Specifically, during operation, the flange plate of the H-shaped steel is placed between the bolt 435 and the first connecting plate 434, the bolt 435 is tightened, the first connecting member 43 is fixed to the H-shaped steel, and then the upper half steel sleeve 4311 and the lower half steel sleeve 4312 are opened, the first steel sleeve 431 is put on the longitudinal horizontal rod 41, and then the bolt 435 on the first fixing plate 432 is tightened to close the first steel sleeve 431, thereby realizing the connection between the longitudinal horizontal rod 41 and the H-shaped steel.

[0023] Specifically, the second connecting member 44 includes a second steel sleeve 441 and a bolt 435. The second steel sleeve 441 includes an upper half steel sleeve 4311 and a lower half steel sleeve 4312. One side of the upper half steel sleeve 4311 is rotatably connected to one side of the lower half steel sleeve 4312. On the other side of the upper half steel sleeve 4311 and the other side of the lower half steel sleeve 4312, second fixing plates 442 are fixedly provided. On the side where the second steel sleeve 441 is rotatably connected, a second connecting pipe 443 is fixedly provided. On the side of the second connecting pipe 443 away from the second steel sleeve 441, a third connecting pipe 444 is fixedly provided. The third connecting pipe 444 is perpendicular to the second connecting pipe 443. On the side of the third connecting pipe 444 away from the second connecting pipe 443, a third steel sleeve 445 is fixedly provided. The structure of the third steel sleeve 445 is the same as that of the second steel sleeve 441. The third steel sleeve 445 is perpendicular to the second steel sleeve 441. On the side of the third steel sleeve 445 away from the third connecting pipe 444, a third fixing plate 446 is fixedly provided. Bolt holes are formed in both the third fixing plate 446 and the second fixing plate 442. The bolt 435 is matched with the bolt holes.

[0024] Specifically, when installing the transverse horizontal bar 42 and the longitudinal horizontal bar 41 at the bottom of the fully recoverable support structure, first open the upper half steel sleeve 4311 and the lower half steel sleeve 4312 of the second steel sleeve 441, sleeved the second steel sleeve 441 on the longitudinal horizontal bar 41, and then tighten the bolt 435 on the second fixing plate 442 to close the second steel sleeve 441. After that, open the upper half steel sleeve 4311 and the lower half steel sleeve 4312 of the third steel sleeve 445, sleeved the third steel sleeve 445 on the transverse horizontal bar 42, and then tighten the bolt 435 on the third fixing plate 446 to close the third steel sleeve 445, so as to realize the connection between the longitudinal horizontal bar 41 and the transverse horizontal bar 42 at the bottom of the fully recoverable support structure. When installing the transverse horizontal bar 42 and the longitudinal horizontal bar 41 at other positions except the bottom of the fully recoverable support structure, first open the upper half steel sleeve 4311 and the lower half steel sleeve 4312 of the third steel sleeve 445, sleeved the third steel sleeve 445 on the longitudinal horizontal bar 41, and then tighten the bolt 435 on the third fixing plate 446 to close the third steel sleeve 445. After that, open the upper half steel sleeve 4311 and the lower half steel sleeve 4312 of the second steel sleeve 441, sleeved the second steel sleeve 441 on the transverse horizontal bar 42, and then tighten the bolt 435 on the second fixing plate 442 to close the second steel sleeve 441, so as to realize the connection between the longitudinal horizontal bar 41 and the transverse horizontal bar 42 at other positions except the bottom of the fully recoverable support structure.

[0025] Specifically, this embodiment further provides a construction method for a fully recoverable support structure with a scaffolding function, including the following steps: S1: Pre-construction preparation: Clean the site, level the ground, and check the equipment and materials used to ensure they meet the design requirements. Then use tools such as laser levels and total stations to accurately calibrate the positions of the foundation pit and the fully recoverable support structure.

[0026] S2: Foundation pit layout and underground facility detection: Accurately lay out the foundation pit location, confirm the scope of the foundation pit, and use underground pipeline detectors to check surrounding facilities.

[0027] S3: Insert steel sheet support piles 1: Use a crawler pile driver to drive the steel sheet piles 11 in sequence according to the designed depth. During the construction process, monitor the verticality and depth of the steel sheet piles 11 in real time to ensure that the pile body is vertical and the depth complies with the regulations.

[0028] S4: Insert the first row of steel support piles 2: Use a total station to locate the installation position of the first row of steel support piles 2, and then use a crawler pile driver to insert the first H-shaped steel 21 in sequence according to the designed depth. During the construction process, the verticality, depth and spacing of the first H-shaped steel 21 are monitored in real time to ensure that the pile body is vertical, the depth is compliant, and the spacing meets the standards.

[0029] S5: Insert the secondary row of steel support piles 3: Use a total station to locate the installation position of the secondary row of steel support piles 3, and then use a crawler pile driver to insert the second H-shaped steel 31 in sequence according to the designed depth. During the construction process, the verticality, depth and spacing of the second H-shaped steel 31 are monitored in real time to ensure that the pile body is vertical, the depth is compliant, and the spacing meets the standards.

[0030] S6: Build the exterior wall construction scaffolding 4: Use the first H-shaped steel 21 and the second H-shaped steel 31 as the supporting vertical poles of the exterior wall construction scaffolding 4, and detachably fix the longitudinal horizontal rod 41 on the first H-shaped steel 21 and the second H-shaped steel 31 according to the designed position, and detachably fix the transverse horizontal rod 42 on the longitudinal horizontal rod 41 according to the designed position, and detachably fix the scaffolding board 45 on the transverse horizontal rod 42 according to the designed position.

[0031] Specifically, step S6 includes: S61: Design and Preparation of Exterior Wall Scaffolding 4: Confirm the design plan for the exterior wall scaffolding 4, prepare the necessary steel pipes, connectors, and other materials, and then inspect the material quality. Before installation begins, check the lifting equipment and measuring tools to ensure smooth construction. Furthermore, after the foundation pit is excavated, install the longitudinal horizontal bars 41, transverse horizontal bars 42, and scaffolding boards 45 in order from bottom to top.

[0032] S62: Install the longitudinal horizontal rod 41: Use a total station or a laser measuring instrument to accurately locate the installation position of the longitudinal horizontal rod 41, hoist the longitudinal horizontal rod 41 to the designed position, and install the longitudinal horizontal rod 41 on the first H-beam 21 and the second H-beam 31 in sequence. After the installation is completed, use a spirit level to check the levelness of the longitudinal horizontal rod 41 to ensure that the levelness meets the design standards.

[0033] S63: Install the transverse horizontal rod 42: Accurately lay out the lines to determine the installation position of the transverse horizontal rod 42, hoist the transverse horizontal rod 42 to the designed position, and install the transverse horizontal rod 42 on the longitudinal horizontal rod 41 in sequence. After the installation is completed, use a spirit level to check the levelness of the transverse horizontal rod 42 to ensure that the levelness meets the design standards.

[0034] S64: Laying the scaffolding boards 45: Lay the scaffolding boards 45 on the horizontal bars 42, and then fix the ends of the scaffolding boards 45 on the horizontal bars 42 using galvanized steel wire with a diameter of 3.2 mm to ensure that each scaffolding board 45 is stable and not shifted, and ensure that the scaffolding boards 45 are not loose to avoid safety hazards during use.

[0035] Specifically, after the installation of the fully recyclable support structure is completed, construction workers can carry out foundation construction, basement exterior wall construction and other construction operations inside the foundation pit. After the construction is completed, the exterior wall construction scaffolding 4, H-shaped steel and steel sheet piles 11 are dismantled, and the materials are cleaned and inspected to ensure that the fully recyclable support structure can be recycled and reused.

[0036] Specifically, the fully recyclable support structure and construction method for the foundation pit, which also serves as an exterior wall construction scaffolding, provided by the present invention, combine the steel sheet piles 11 and H-shaped steel with the exterior wall construction scaffolding 4, and construct a sharing mechanism with the exterior wall construction scaffolding 4, so that the fully recyclable support structure has the function of a scaffolding, and the exterior wall construction scaffolding 4 adopts a new type of connecting parts to ensure the stability, safety and sustainability of the exterior wall construction scaffolding 4 during the construction of the basement exterior wall. The fully recyclable support structure has improved rigidity, broadened the application depth of the foundation pit of the fully recyclable support structure, can support a larger foundation pit excavation depth, increase the proportion of fully recyclable standard components in the building, and reduce deformation caused by soil pressure; furthermore, the steel sheet piles 11, H-shaped steel and the exterior wall construction scaffolding 4 are effectively integrated, which can make full use of the limited construction space, improve the utilization rate of the structural space, avoid resource waste, and improve construction efficiency; in addition, the fully recyclable support structure can be recycled and reused, and the steel can be reused after the construction is completed, reducing material costs and environmental burden. In general, the fully recyclable support structure provided by the present invention is suitable for foundation pit projects that have certain requirements on excavation depth (the foundation pit excavation depth is denoted as L, and L should satisfy L≤10m), have limited support structure space, and expect to recycle all support structures to reduce construction costs.

[0037] The above embodiments only illustrate the basic principles and characteristics of the present invention, but are not limited by the above embodiments. It should be understood that those of ordinary skill in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention, and these changes and modifications all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A fully recyclable support structure with scaffolding function, characterized in that, It includes a steel sheet pile retaining row (1), a first row of H-shaped steel sheet pile retaining row (2), a second row of H-shaped steel sheet pile retaining row (3) and an exterior wall construction scaffold (4). The steel sheet pile retaining row (1) includes a number of steel sheet piles (11), and the steel sheet piles (11) are connected end to end in sequence. The first row of H-shaped steel sheet pile retaining row (2) is arranged on one side of the steel sheet pile retaining row (1). The first row of H-shaped steel sheet pile retaining row (2) includes a number of first H-shaped steels (21), and the first H-shaped steels (21) are arranged at intervals. The second row of H-shaped steel sheet pile retaining row (3) is arranged on the side of the first row of H-shaped steel sheet pile retaining row (2) away from the steel sheet pile retaining row (1). The second row of H-shaped steel sheet pile retaining row (3) is arranged at intervals with the first row of H-shaped steel sheet pile retaining row (2). The second row of H-shaped steel sheet pile retaining row (3) includes a number of second H-shaped steels (31), and the second H-shaped steels (31) are arranged at intervals. And each second H-shaped steel (31) is arranged opposite to the corresponding first H-shaped steel (21). The exterior wall construction scaffold (4) includes longitudinal horizontal bars (41), transverse horizontal bars (42) and scaffold boards (45). The longitudinal horizontal bars (41) are detachably and fixedly connected to the first H-shaped steels (21) and the second H-shaped steels (31) through first connectors (43). The transverse horizontal bars (42) are detachably and fixedly connected to the longitudinal horizontal bars (41) through second connectors (44). The scaffold boards (45) are detachably and fixedly arranged on the transverse horizontal bars (42).

2. The fully recoverable support structure with scaffolding function according to claim 1, wherein Both the longitudinal horizontal bars (41) and the transverse horizontal bars (42) are steel pipes with a diameter of φ48.3×3.

6.

3. The fully recoverable support structure with scaffolding function according to claim 1, characterized in that, The transverse horizontal bars (42) at the bottom of the fully recoverable retaining structure are arranged below the longitudinal horizontal bars (41). Except for the transverse horizontal bars (42) at the bottom of the fully recoverable retaining structure, the transverse horizontal bars (42) at other positions are arranged above the longitudinal horizontal bars (41).

4. The fully recoverable support structure with scaffolding function according to claim 1, characterized in that, The first connector (43) includes a first steel sleeve (431) and a bolt (435). The first steel sleeve (431) includes an upper half steel sleeve (4311) and a lower half steel sleeve (4312). One side of the upper half steel sleeve (4311) is rotatably connected to one side of the lower half steel sleeve (4312). On the other side of the upper half steel sleeve (4311) and the other side of the lower half steel sleeve (4312), first fixing plates (432) are fixedly provided. On the rotatably connected side of the first steel sleeve (431), a first connecting pipe (433) is fixedly provided. On the side of the first connecting pipe (433) away from the first steel sleeve (431), a first connecting plate (434) is fixedly provided. Bolt holes are provided on both the first connecting plate (434) and the first fixing plate (432). The bolt (435) is matched with the bolt hole.

5. The fully recoverable support structure with scaffolding function according to claim 4, characterized in that, The second connecting member (44) includes a second steel sleeve (441) and a bolt (435). The second steel sleeve (441) includes an upper steel sleeve (4311) and a lower steel sleeve (4312). One side of the upper steel sleeve (4311) and one side of the lower steel sleeve (4312) are rotatably connected. The other side of the upper steel sleeve (4311) and the other side of the lower steel sleeve (4312) are both fixedly provided with a second fixing plate (442). A second connecting pipe (443) is fixedly provided on one side of the second steel sleeve (441) to which the second steel sleeve (441) is rotatably connected. A third connecting pipe (443) is fixedly provided on the side of the second connecting pipe (443) away from the second steel sleeve (441). The third connecting pipe (444) is vertically arranged with the second connecting pipe (443), and a third steel sleeve (445) is fixedly provided on the side of the third connecting pipe (444) away from the second connecting pipe (443). The structure of the third steel sleeve (445) is the same as that of the second steel sleeve (441). The third steel sleeve (445) is vertically arranged with the second steel sleeve (441), and a third fixing plate (446) is fixedly provided on the side of the third steel sleeve (445) away from the third connecting pipe (444). Bolt holes are provided on both the third fixing plate (446) and the second fixing plate (442), and the bolts (435) match the bolt holes.

6. A construction method using the fully recyclable support structure with scaffolding function according to any one of claims 1 to 5, comprising the following steps: S1: Preparation before construction: clean the site, level the ground, mark the location of the foundation pit and the fully recoverable support structure; S2: Foundation pit layout and underground facility detection: Lay out the foundation pit location, confirm the scope of the foundation pit, and use equipment to check surrounding facilities; S3: Inserting steel sheet support piles (1): driving steel sheet piles (11) in sequence according to the designed depth, and monitoring the verticality and depth of the steel sheet piles (11) in real time during the construction process; S4: Inserting the first row of steel support piles (2): inserting the first H-shaped steel (21) in sequence according to the designed depth, and monitoring the verticality, depth and spacing of the first H-shaped steel (21) in real time during the construction process; S5: Inserting the second row of steel support piles (3): inserting the second H-shaped steel (31) in sequence according to the designed depth, and monitoring the verticality, depth and spacing of the second H-shaped steel (31) in real time during the construction process; S6: Building an exterior wall construction scaffold (4): Using the first H-shaped steel (21) and the second H-shaped steel (31) as support poles of the exterior wall construction scaffold (4), the longitudinal horizontal rod (41) is detachably fixedly installed on the first H-shaped steel (21) and the second H-shaped steel (31) according to the designed position, the transverse horizontal rod (42) is detachably fixedly installed on the longitudinal horizontal rod (41) according to the designed position, and the scaffolding board (45) is detachably fixedly installed on the transverse horizontal rod (42) according to the designed position.

7. The construction method of the fully recoverable support structure with scaffolding function according to claim 6, characterized in that, The step S6 specifically includes: S61: Design and preparation of the exterior wall construction scaffolding (4): Confirm the design plan of the exterior wall construction scaffolding (4), prepare the necessary materials, and then check the material quality and equipment used. After the foundation pit is excavated, install the longitudinal horizontal bars (41), transverse horizontal bars (42) and scaffolding boards (45) in order from bottom to top; S62: Install the longitudinal horizontal rod (41): Locate the installation position of the longitudinal horizontal rod (41), hoist the longitudinal horizontal rod (41) to the designed position, and then install the longitudinal horizontal rod (41) on the first H-shaped steel (21) and the second H-shaped steel (31) in sequence. After the installation is completed, check the horizontality of the longitudinal horizontal rod (41); S63: Install the transverse horizontal rod (42): Lay out the lines to determine the installation position of the transverse horizontal rod (42), hoist the transverse horizontal rod (42) to the designed position, and then install the transverse horizontal rod (42) on the longitudinal horizontal rod (41) in sequence. After the installation is completed, check the horizontality of the transverse horizontal rod (42); S64: Laying the scaffolding board (45): Laying the scaffolding board (45) on the horizontal bar (42), and then reinforcing the connection.

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