Construction method of DSA floor C-arm independent foundation

Abstract

The application provides a construction method of a DSA floor C-arm independent foundation, which comprises the following steps: laying a protective lead plate, constructing a lower retaining wall and a foundation reinforcement, pouring a lower part of a center foundation and an enlarged foundation, constructing an upper retaining wall, backfilling, laying a surface layer reinforcement, pouring an upper part of the center foundation and the surface layer reinforcement, and the like. The construction method of the application does not need to plant a reinforcement in a concrete floor slab, and can prevent the protective lead plate from being damaged.

Description

Technical Field

[0001] This invention relates to the field of foundation construction technology, specifically a construction method for a DSA-based C-arm independent foundation. Background Technology

[0002] In complex hospital projects, due to delays in medical equipment bidding, the construction of the supporting equipment foundations often lags behind the main structure. Therefore, it's common for the equipment foundations to be constructed only after the main structure is completed. In such cases, rebar needs to be installed into the main structure to reinforce the equipment foundations. DSA operating rooms require lead plates on the floor for radiation protection; however, rebar installation would penetrate these lead plates, compromising their protective performance. The C-arm of a DSA often weighs over 1 ton and has a large range of motion, exerting significant bending moments on the foundation. Therefore, how to construct a foundation capable of withstanding the load of a DSA C-arm without installing rebar into the floor slab is a problem worthy of research. Summary of the Invention

[0003] In view of the above-mentioned prior art, the present invention proposes a construction method for a DSA ground-mounted C-arm independent foundation.

[0004] This invention provides a construction method for a DSA (Digital Substation) C-arm independent foundation, comprising the following steps:

[0005] S1. Laying protective lead plates: After leveling the structural floor slab with cement mortar, lay protective lead plates.

[0006] S2. Construction of the lower retaining wall and foundation reinforcement: Mark the foundation dimensions on the protective lead plate, build the lower retaining wall as a formwork for pouring the enlarged foundation, tie the foundation reinforcement of the central foundation and the enlarged foundation inside the lower retaining wall, so that the foundation reinforcement of the enlarged foundation is anchored in the central foundation, and the reinforcement is located on the top surface.

[0007] S3. Construct the lower part of the central foundation and the spread foundation: Construct the lower part of the central foundation and the spread foundation using concrete;

[0008] S4. Construction of the upper retaining wall: After the concrete of the lower part of the central foundation and the enlarged foundation has set, an upper retaining wall is built around the central foundation to serve as a formwork for pouring the upper part of the central foundation.

[0009] S5. Backfilling: After the upper retaining wall is completed, backfill the concrete outside the central foundation area of ​​the entire room.

[0010] S6. Laying surface reinforcement: After the backfilled concrete has completely hardened, lay surface reinforcement. The surface reinforcement is set on the upper layer of the central foundation and interpenetrates with the top reinforcement of the central foundation.

[0011] S7. Casting the upper part of the central foundation and surface reinforcement: Remove the laitance from the lower part of the already cast central foundation and the surface of the enlarged foundation. First, cast the upper part of the central foundation with concrete, then cast the surface reinforcement. After casting, finish and cure the entire surface to form a whole. Finally, carry out PVC floor construction and install the ground C-arm.

[0012] Preferably, a 200mm thick lower retaining wall and a 200mm thick upper retaining wall are constructed using solid cement bricks.

[0013] Preferably, both the foundation reinforcement and the surface reinforcement use C12@200 single-layer bidirectional steel mesh.

[0014] Preferably, both the central foundation and the enlarged foundation are cast using C25 fine aggregate concrete.

[0015] Preferably, the backfill is made of foamed concrete.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a construction method for an independent foundation for a DSA ground-mounted C-arm, which can be applied to the equipment foundation of a DSA ground-mounted C-arm. DSA equipment rooms usually use lead plates as radiation protection materials. Because the equipment arrives late, the foundation construction is carried out only after the lead plates are laid. Therefore, the anchoring of the foundation reinforcement will damage the lead plates and affect the radiation protection performance. The method used in the present invention is special and does not require reinforcement to be installed in the concrete floor slab, which can prevent the protective lead plates from being damaged. Attached Figure Description

[0017] Figure 1-4 This is a schematic diagram of the construction method of the DSA-based C-arm independent foundation according to an embodiment of the present invention;

[0018] In the diagram: 1. Protective lead plate; 2. Lower retaining wall; 3. Spread foundation; 4. Central foundation; 5. Foundation reinforcement; 6. Upper retaining wall; 7. Surface reinforcement; 8. Ground-mounted C-arm. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations. Example

[0020] A construction method for a DSA (Digital Substructure) ground-mounted C-arm independent foundation, such as... Figure 1-4 As shown, it includes the following steps:

[0021] S1. Laying protective lead plates: After leveling the structural floor slab with cement mortar, lay protective lead plates 1.

[0022] S2. Construction of the lower retaining wall and foundation reinforcement: Mark the foundation dimensions on the protective lead plate 1, and build a 200mm thick lower retaining wall 2 using solid cement bricks as a formwork for pouring the enlarged foundation 3. Tie the foundation reinforcement 5 of the central foundation 4 and the enlarged foundation 3 inside the lower retaining wall 2, so that the foundation reinforcement 5 of the enlarged foundation 3 is anchored in the central foundation 4. The foundation reinforcement 5 is a C12@200 single-layer two-way steel mesh, and the steel bars are located on the top surface.

[0023] The central foundation 4 serves as the anchorage point for the C-arm and primarily bears the vertical pressure of the C-arm. The foundation reinforcement 5 of the central foundation 4 is located on the top surface of the spread foundation 3, and is equipped with a single-layer bidirectional steel mesh to prevent tensile cracking of the top concrete. The foundation reinforcement 5 of the spread foundation 3 is anchored within the central foundation 4, which increases the foundation size, enhances its stability, and prevents overturning. When the C-arm is under the most unfavorable working condition, its center of gravity is located within the spread foundation 3. The anchorage point of the spread foundation 3 to the central foundation 4 has a certain bending resistance, which can counteract the overturning moment of the C-arm. Neither the central foundation 4 nor the spread foundation 3 requires reinforcement to the concrete slab, thus avoiding damage to the protective lead plate 1.

[0024] S3. Casting the lower part of the center foundation and the spread foundation: Casting the lower part of the center foundation 4 and the spread foundation 3 with C25 fine aggregate concrete.

[0025] S4. Construction of the upper retaining wall: After the concrete of the lower part of the central foundation 4 and the enlarged foundation 3 has set, a 200mm thick upper retaining wall 6 is built around the central foundation 4 using cement solid bricks as a formwork for pouring the upper part of the central foundation 4.

[0026] S5. Backfilling: After the upper retaining wall 6 is completed, backfill the foamed concrete outside the central foundation 4 area of ​​the entire room.

[0027] S6. Laying surface reinforcement: After the backfilled concrete has completely hardened, C12@200 single-layer bidirectional steel mesh is used to lay surface reinforcement 7. Surface reinforcement 7 is set on the upper layer of the central foundation 4 and interpenetrates with the top reinforcement of the central foundation 4, so that the top surface of the central foundation 4 is densified to C12@100 steel mesh.

[0028] Among them, the steel bars of the surface reinforcement 7 are connected above the reinforcement of the central foundation 4, so that the central foundation 4 and the surface reinforcement 7 are cast into a whole, which can further ensure the stability of the foundation and prevent cracking of the top surface.

[0029] S7. Casting the upper part of the central foundation and surface reinforcement: Remove the laitance from the lower part of the already cast central foundation 4 and the surface of the enlarged foundation 3. First, cast the upper part of the central foundation 4 with C25 fine stone concrete, then cast the surface reinforcement 7. After casting, finish and cure the entire surface to form a whole. Finally, carry out PVC floor construction and install the ground C-arm 8.

[0030] In this invention, the width of the central foundation 4 is determined according to the equipment manual, and is usually around 1m. The width of the enlarged foundation 3 is determined based on the center of gravity of the equipment under the most unfavorable working condition. The height of the central foundation 4 is calculated based on the depth of the lowered slab. For example, if the structural lowered slab depth is 200mm, the protective lead plate and its leveling layer are 5mm thick, and the decorative surface layer on the top of the foundation is 2mm self-leveling concrete + 1mm floor adhesive + 2mm PVC, totaling 5mm, then h = 200 - 5 - 5 = 190mm. The height of the lower retaining wall 2 is h / 2, the pouring thickness of the central foundation 4 is h / 2, and the height of the upper retaining wall 6 is h / 2 - 50mm, where 50mm is the total thickness of the surface reinforcement 7 and the ground decorative layer.

[0031] This invention utilizes an enlarged foundation to ensure that the center of gravity of the C-arm is within the foundation range under the most unfavorable working conditions. The top surface of the foundation is connected to the ground surface steel mesh, which eliminates the tendency of the foundation to overturn and prevents surface cracking.

[0032] The above are merely embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent substitutions made using the present invention's specification and drawings, whether directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of the present invention.

Claims

1. A construction method for a DSA (Digital Substructure Association) ground-mounted C-arm independent foundation, characterized in that, Includes the following steps: S1. Laying protective lead plates: After leveling the structural floor slab with cement mortar, lay protective lead plates (1). S2. Construction of the lower retaining wall and foundation reinforcement: Mark the foundation dimensions on the protective lead plate (1), build the lower retaining wall (2) as a formwork for pouring the enlarged foundation (3), tie the foundation reinforcement (5) of the central foundation (4) and the enlarged foundation (3) inside the lower retaining wall (2), so that the foundation reinforcement (5) of the enlarged foundation (3) is anchored in the central foundation (4), and the foundation reinforcement (5) of the central foundation (4) and the enlarged foundation (3) are both located on the top surface of the protective lead plate (1); S3. Casting the lower part of the central foundation and the spread foundation: Casting the lower part of the central foundation (4) and the spread foundation (3) with concrete. S4. Construction of the upper retaining wall: After the concrete of the lower part of the central foundation (4) and the enlarged foundation (3) has set, an upper retaining wall (6) is built around the central foundation (4) as a formwork for pouring the upper part of the central foundation (4). S5. Backfilling: After the upper retaining wall (6) is completed, backfill the concrete outside the range of the central foundation (4) in the entire room; S6. Laying surface reinforcement: After the backfilled concrete has fully hardened, lay surface reinforcement (7). The surface reinforcement (7) is set on the upper layer of the central foundation (4) and interpenetrates with the top reinforcement of the central foundation (4). S7. Casting the upper part of the central foundation and surface reinforcement: Remove the laitance from the lower part of the already cast central foundation (4) and the surface of the enlarged foundation (3), cast the upper part of the central foundation (4) with concrete first, and then cast the surface reinforcement (7). After casting, finish the surface and cure it to form a whole. Finally, carry out PVC floor construction and install the ground C-arm (8).

2. The construction method of the DSA ground-mounted C-arm independent foundation as described in claim 1, characterized in that, A 200mm thick lower retaining wall (2) and a 200mm thick upper retaining wall (6) were constructed using cement solid bricks.

3. The construction method of the DSA ground-mounted C-arm independent foundation as described in claim 1 or 2, characterized in that, The foundation reinforcement (5) and surface reinforcement (7) both adopt C12@200 single-layer two-way steel mesh.

4. The construction method of the DSA ground-mounted C-arm independent foundation as described in claim 1 or 2, characterized in that, Both the central foundation (4) and the enlarged foundation (3) are constructed using C25 fine aggregate concrete.

5. The construction method of the DSA ground-mounted C-arm independent foundation as described in claim 1 or 2, characterized in that, The backfill is made of foamed concrete.

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