A roof cantilever type building vibration isolation waterproof structure and a construction method thereof

Abstract

This invention discloses a cantilevered roof structure for vibration isolation and waterproofing, and its construction method. The structure includes a foundation, sidewalls, and retaining walls. From bottom to top, the foundation consists of a concrete pad, a first waterproof layer, a vibration isolation layer, a second waterproof layer, and a base slab. The sidewalls include an outer wall of the basement and a vibration isolation layer and a waterproof layer sequentially bonded to the outer surface of the basement outer wall. The retaining walls include a roof slab, a cantilevered retaining wall, a vibration isolation layer, and an outer waterproof layer. The vibration isolation layer and the outer waterproof layer are sequentially bonded to the first sidewall of the cantilevered retaining wall, with the vibration isolation layer corresponding to and extending from the sidewall vibration isolation layer, and the outer waterproof layer corresponding to and extending from the sidewall waterproof layer. This invention achieves complete horizontal and vertical isolation between the building foundation and the surrounding soil, thoroughly avoiding vibration short-circuit effects, and its vibration isolation efficiency is significantly higher than that of a scheme that only sets a vibration isolation pad below the basement roof slab.

Description

Technical Field

[0001] This invention relates to the field of building vibration isolation technology, and more specifically to a roof cantilever type building vibration isolation and waterproof structure and its construction method. Background Technology

[0002] With urban development, environmental vibration sources such as subways and highways are increasing, causing significant disturbance to surrounding buildings, especially vibration-sensitive structures like hospitals, laboratories, and precision instrument workshops. Traditional building vibration isolation measures often involve installing vibration isolation bearings or pads under the foundation slab. However, these conventional methods are difficult to implement in cases with basements and roofs requiring soil covering and greening. Vibrations can be transmitted through the soil cover to the basement roof slab and then into the building interior.

[0003] In the existing technology, there is also a scheme to set a vibration isolation layer between the foundation slab and the cushion layer, but the following problems are common: (1) The vibration isolation layer is only set below the basement roof slab, and the basement roof slab is still in direct contact with the soil. Vibration can be transmitted through the lateral soil "short circuit", which greatly reduces the vibration isolation effect; (2) The side wall vibration isolation pad is exposed to the outside of the waterproof layer and is in direct contact with the soil. There is a situation where the water ingress of the vibration isolation pad increases the stiffness, which reduces the vibration reduction effect. The side wall vibration isolation pad is in a complex underground environment for a long time and will be subject to long-term erosion by acid and alkali substances and microorganisms. The vibration isolation pad is irreplaceable, which affects the long-term performance of the vibration isolation pad; (3) In the existing technology, the bottom vibration isolation pad and the side wall vibration isolation pad are separated by the waterproof layer and are independent of each other, making it difficult to form a continuous whole. This weakens the integrity of the vibration isolation layer to a certain extent.

[0004] In addition, the existing technology only supports the construction method of fully covering the basement roof with vibration damping pads, but there are no implementation cases. Using this method will double the amount of vibration damping pads used at the bottom, increasing construction costs.

[0005] Therefore, how to provide a low-cost, integrated vibration isolation and waterproof structure that can achieve full-circumferential vibration isolation and effectively ensure a long-term dry environment for the vibration isolation layer, thereby improving the vibration isolation effect, is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the present invention provides a cantilevered roof structure for vibration isolation and waterproofing, and its construction method, which can significantly improve the vibration reduction performance of basement structures compared with existing technologies. This structure provides a dry, stable, and protective environment for the vibration isolation pads, thereby maintaining their performance and extending their service life during long-term operation.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A cantilevered vibration isolation and waterproofing structure for roof slabs is installed in the soil-covered area of ​​the building foundation and basement roof slab, including a foundation structure, side wall structure and retaining wall structure.

[0009] The basic structure, from bottom to top, consists of a concrete pad, a first waterproof layer, a vibration isolation layer, a second waterproof layer, and a base slab. The basement structure is constructed on the base slab. The side wall structure includes an exterior basement wall and a vibration isolation layer and a waterproof layer, sequentially bonded to the exterior wall surface. The lower end of the exterior basement wall is anchored to the top surface of the base slab. The vibration isolation layer connects to the foundation vibration isolation layer, and the waterproof layer connects to the first waterproof layer.

[0010] The retaining wall structure includes a top slab, a cantilever retaining wall, a retaining wall vibration isolation layer, and an external waterproofing layer; the bottom surface of the top slab is anchored to the upper surface of the basement exterior wall; the cantilever retaining wall is anchored to the top surface of the top slab and is arranged corresponding to the basement exterior wall; the retaining wall vibration isolation layer and the external waterproofing layer are sequentially bonded to the first side wall of the cantilever retaining wall, and the retaining wall vibration isolation layer extends along the side wall vibration isolation layer, and the external waterproofing layer extends along the side wall waterproofing layer.

[0011] The beneficial effects of this invention are as follows: By integrating vibration isolation and waterproofing treatment on the building foundation, basement exterior walls, and roof cantilever retaining walls, the side wall vibration isolation layer and waterproofing layer are seamlessly connected to form the retaining wall vibration isolation layer and the outer waterproofing layer, respectively, thus creating a continuous and sealed whole. This structure ensures that all underground parts of the building are completely isolated from the vibration propagation medium (soil) by the vibration isolation layer. Simultaneously, the outer waterproofing layer effectively blocks groundwater erosion, providing reliable protection for the vibration isolation layer. Based on the above design, the transmission of subway vibrations to the basement and superstructure is significantly suppressed, improving the vibration isolation performance of the basement structure while also ensuring the long-term durability of the vibration isolation layer.

[0012] Preferably, the retaining wall structure further includes a top waterproofing layer and an inner waterproofing layer; the top surface of the top slab is provided with a top slab waterproofing layer; the top waterproofing layer is located on the top wall of the cantilever retaining wall; the inner waterproofing layer is located on the second side wall of the cantilever retaining wall and connected to the top waterproofing layer; the top waterproofing layer is connected to the outer waterproofing layer, and the inner waterproofing layer is connected to the top slab waterproofing layer. By providing a top waterproofing layer connected to the outer waterproofing layer and an inner waterproofing layer connected to the top slab waterproofing layer on the top and inner walls of the cantilever retaining wall respectively, the side wall waterproofing layer, outer waterproofing layer, top waterproofing layer, inner waterproofing layer, and top slab waterproofing layer are connected as a whole and enclose the basement structure, improving the overall waterproofing performance of the basement while ensuring the waterproofing effect of the vibration isolation layer and extending its service life.

[0013] Preferably, the outer waterproof layer, top waterproof layer, inner waterproof layer, and side wall waterproof layer of the retaining wall are all composed of a 1.5mm thick self-adhesive membrane and a 2.0mm thick anti-flowing non-asphalt rubber waterproof coating. During construction, the outer waterproof layer, top waterproof layer, inner waterproof layer, or side wall waterproof layer do not require open flame baking. The side wall vibration isolation layer and the retaining wall vibration isolation layer can be constructed first, followed by the outer, top, and inner side wall waterproof layers and the outer retaining wall waterproof layer. This ensures that the retaining wall vibration isolation layer and the side wall vibration isolation layer are located inside the outer and side wall waterproof layers and do not come into contact with groundwater, thus improving their service life.

[0014] Preferably, the top surface of the top slab has a main building structure, and there is a filling gap between the outer wall of the main building structure and the second side wall of the cantilever retaining wall, and the filling gap is filled with backfill soil.

[0015] Preferably, there are multiple basement exterior walls, and the multiple basement exterior walls together with the roof slab form a basement structure.

[0016] Preferably, the foundation vibration isolation layer, the side wall vibration isolation layer, and the retaining wall vibration isolation layer are spliced ​​together from multiple polyurethane foam elastomer pads; a waterproof sealing strip is provided between two adjacent polyurethane foam elastomer pads.

[0017] Preferably, a concrete protective layer is provided between the first waterproof layer and the foundation vibration isolation layer. By providing a concrete protective layer, the waterproof performance of the foundation structure can be improved, preventing groundwater from seeping into the basement. Simultaneously, the concrete protective layer can also serve as the base layer for the foundation vibration isolation layer.

[0018] Preferably, the thickness of the concrete cushion layer is not less than 100 mm; the thickness of the concrete protective layer is not less than 50 mm.

[0019] Preferably, the first waterproof layer of the foundation is a 3mm thick polymer-modified bitumen waterproof self-adhesive membrane; the second waterproof layer of the foundation is a 4mm thick polymer-modified bitumen pre-laid reverse-adhesive waterproof membrane.

[0020] Preferably, the outer side of the side wall waterproof layer and the outer waterproof layer of the retaining wall is provided with polystyrene board and brick protective wall arranged parallel to the basement outer wall.

[0021] This invention also provides a construction method for a cantilevered roof structure with vibration isolation and waterproofing, comprising the following steps:

[0022] S1. Pour a concrete cushion layer at the bottom of the foundation pit, and lay the first waterproof layer of the foundation after the concrete cushion layer has set.

[0023] S2. Pour a concrete protective layer on the first waterproof layer of the foundation. After the concrete protective layer has set, lay the foundation vibration isolation layer and the second waterproof layer of the foundation in sequence.

[0024] S3. Tie the bottom slab reinforcement and pour the bottom slab concrete. After the bottom slab construction is completed, construct the basement structure.

[0025] S4. Construct the side wall vibration isolation layer and the side wall waterproof layer sequentially on the outer wall surface of the basement exterior wall; after the side wall waterproof layer is completed, construct the side wall waterproof protective layer and brick protective wall, and then backfill the outer side of the basement exterior wall with soil.

[0026] S5. Construct a cantilever retaining wall around the top surface of the basement structure's roof slab.

[0027] S6. The outer wall of the cantilever retaining wall shall be constructed with the retaining wall vibration isolation layer and the outer waterproof layer in sequence; after the outer waterproof layer is completed, the top waterproof layer and the inner waterproof layer shall be constructed.

[0028] S7. Backfill soil on both sides of the cantilever retaining wall simultaneously.

[0029] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a cantilevered roof building vibration isolation and waterproofing structure and its construction method, which has the following beneficial effects:

[0030] 1. Full-circumferential vibration isolation: Through the construction of "cantilever retaining walls and vibration isolation layers extending vertically to the basement exterior walls", the building foundation is completely isolated from the surrounding soil in both horizontal and vertical directions, thus completely avoiding the vibration "short circuit" effect. The vibration isolation efficiency is significantly higher than that of the scheme that only sets vibration isolation pads below the basement top slab.

[0031] 2. Waterproof and reliable, ensuring vibration isolation durability: The vibration isolation layer in contact with the building adopts a double-layer waterproof sandwich structure, which seals the foundation vibration isolation layer in a dry environment, effectively preventing water vapor and groundwater from eroding the foundation vibration isolation layer, greatly extending the service life of the foundation vibration isolation layer, and solving the problem of mutual constraints between vibration isolation and waterproofing.

[0032] 3. Clear structure and feasible construction: The vibration isolation and waterproof structure has distinct layers and good compatibility with conventional construction procedures. The cantilever retaining wall can be constructed first as a conventional retaining structure, and subsequent construction processes can be carried out in an orderly manner, demonstrating excellent engineering feasibility.

[0033] 4. Flexible application: It is particularly suitable for scenarios where vibration-sensitive buildings need to be constructed above the basement roof of new buildings, such as hospital wards, research buildings, and high-end residences. It can perfectly solve the vibration problem without affecting the functionality of the basement. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0035] Figure 1 This is a cross-sectional view of the vibration isolation and waterproof structure provided by the present invention;

[0036] Figure 2 for Figure 1 Enlarged diagram of part A in the diagram;

[0037] Figure 3 This is a cross-sectional view of the retaining wall structure provided by the present invention.

[0038] Among them, 1-basic structure; 11-concrete cushion layer; 12-first waterproof layer of foundation; 13-concrete protective layer; 14-foundation vibration isolation layer; 15-second waterproof layer of foundation; 16-basement slab; 2-side wall structure; 21-basement exterior wall; 22-side wall vibration isolation layer; 23-side wall waterproof layer; 3-retaining wall structure; 31-cantilever retaining wall; 32-retaining wall vibration isolation layer; 33-outer waterproof layer of retaining wall; 34-top waterproof layer of retaining wall; 35-inner waterproof layer of retaining wall; 36-top slab; 37-top slab waterproof layer; 4-brick protective wall; 5-basement structure; 6-main building structure. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] See appendix Figure 1According to embodiment 3 of the present invention, a cantilevered vibration isolation and waterproofing structure for a building is provided in the soil-covered area of ​​the building foundation and the basement roof slab, including a foundation structure 1, a side wall structure 2, and a retaining wall structure 3; the foundation structure 1 consists of, from bottom to top, a concrete pad 11, a first waterproof layer 12, a vibration isolation layer 14, a second waterproof layer 15, and a base slab 16, on which the basement structure 5 is constructed; the side wall structure 2 includes a basement exterior wall 21 and a side wall vibration isolation layer 22 and a side wall waterproofing layer 23 sequentially bonded to the outer wall surface of the basement exterior wall 21; the lower end face of the basement exterior wall 21 is anchored to the top surface of the base slab 16; The side wall vibration isolation layer 22 is connected to the foundation vibration isolation layer 14, and the side wall waterproof layer 23 is connected to the foundation first waterproof layer 12; the retaining wall structure 3 includes a top slab 36, a cantilever retaining wall 31, a retaining wall vibration isolation layer 32, and an outer waterproof layer 33; the bottom surface of the top slab 36 is anchored to the upper end surface of the basement outer wall 21; the cantilever retaining wall 31 is anchored to the top surface of the top slab 36 and is arranged corresponding to the basement outer wall 21; the retaining wall vibration isolation layer 32 and the outer waterproof layer 33 are sequentially bonded to the first side wall of the cantilever retaining wall 31, and the retaining wall vibration isolation layer 32 extends along the side wall vibration isolation layer 22, and the outer waterproof layer 33 extends along the side wall waterproof layer 23.

[0041] like Figure 1 and 2 As shown, in this embodiment, a cantilever retaining wall is set at the edge of the basement roof slab. The vibration isolation layer of the retaining wall is laid on the first side wall of the cantilever retaining wall and extends along the side wall vibration isolation layer. Its coverage completely encloses the projected area and side of the base slab. This allows the base slab and its load to be "lifted" and "wrapped" by the vibration isolation layer, achieving physical isolation from the concrete pad below and the soil cover in all directions around, cutting off all paths of vibration transmission.

[0042] In this embodiment, the height of the cantilever retaining wall is greater than the distance between the basement roof slab and the outdoor ground level, and the thickness is not less than 200mm; the cantilever retaining wall is a cast-in-place reinforced concrete retaining wall or a brick retaining wall.

[0043] It should be noted that a cantilever retaining wall consists of a base slab and a vertical wall fixed to the base slab. The stability of the cantilever retaining wall is mainly maintained by the weight of the backfill on the base slab. It primarily consists of three components: the vertical wall, the toe slab, and the heel slab.

[0044] To further optimize the above technical solution, the first waterproof layer 12 is a 3mm thick polymer-modified bitumen waterproof self-adhesive membrane; the second waterproof layer 15 is a 4mm thick polymer-modified bitumen pre-laid reverse-adhesive waterproof membrane.

[0045] The first waterproof layer of the foundation is used to prevent groundwater from eroding the foundation vibration isolation layer from below. The second waterproof layer of the foundation is used to prevent water used during construction and use from seeping into the foundation vibration isolation layer. By setting two layers of waterproof layers, a closed and dry working environment is created for the foundation vibration isolation layer. At the same time, the second waterproof layer of the foundation is a 4mm thick polymer modified bitumen (polyester-based PY) pre-laid reverse-adhesive roll material, which is directly bonded to the foundation slab concrete, eliminating the need for a waterproof protective layer. At the same time, it forms a tight waterproof protective membrane layer that is directly bonded to the concrete, making the waterproof effect more reliable and preventing water seepage problems caused by traditional SBS modified bitumen waterproofing and other waterproofing methods, thus saving construction costs and subsequent maintenance costs.

[0046] In this embodiment, a concrete protective layer 13 is provided between the foundation first waterproof layer 12 and the foundation vibration isolation layer 14. The concrete protective layer 13 can prevent damage to the foundation first waterproof layer 12 during construction, ensuring the performance of the foundation first waterproof layer 12. At the same time, the surface of the concrete protective layer 13 can be leveled to serve as the base layer for the installation of the foundation vibration isolation layer 14.

[0047] To further optimize the above technical solution, the thickness of the concrete cushion layer 11 shall not be less than 100 mm; the thickness of the concrete protective layer 13 shall not be less than 50 mm.

[0048] In this embodiment, the retaining wall structure 3 further includes a top waterproof layer 34 and an inner waterproof layer 35; the top surface of the top plate 36 is provided with a top plate waterproof layer 37; the top waterproof layer 34 is provided on the top wall of the cantilever retaining wall 31; the inner waterproof layer 35 is provided on the second side wall of the cantilever retaining wall 31 and connected to the top waterproof layer 34; the top waterproof layer 34 is connected to the outer waterproof layer 33, and the inner waterproof layer 35 is connected to the top plate waterproof layer 37.

[0049] The outer waterproof layer, top waterproof layer, inner waterproof layer, side wall waterproof layer, and roof waterproof layer of the retaining wall form a stable overall waterproof structure that completely covers the side wall vibration isolation layer and the retaining wall vibration isolation layer, effectively preventing the side wall vibration isolation layer and the retaining wall vibration isolation layer from being eroded.

[0050] In some other specific embodiments, there are multiple basement exterior walls 21, and the multiple basement exterior walls 21 together with the roof slab 36 form a basement structure 5; the top surface of the roof slab 36 has a main building structure 6, and there is a filling gap between the exterior wall of the main building structure 6 and the second side wall of the cantilever retaining wall 31, and backfill soil is provided in the filling gap.

[0051] It is important to note that the underground portion of the main building structure also has the same vibration isolation layer and waterproofing layer as the side wall structure. The exterior walls of the main building structure and the retaining wall structure together form a ring structure, enabling the vibration isolation layer to isolate all underground parts of the building from the vibration transmission medium. Backfill soil is provided on both the inner and outer sides of the ring structure formed by the exterior walls of the main building structure and the retaining wall structure.

[0052] To further optimize the above technical solution, the outer waterproof layer 33, the top waterproof layer 34, the inner waterproof layer 34, and the side wall waterproof layer 23 of the retaining wall are all composed of a 1.5mm thick self-adhesive membrane and a 2.0mm thick anti-fluidization non-asphalt rubber waterproof coating.

[0053] In actual construction, since waterproofing does not require open flame baking, the side wall vibration isolation layer and retaining wall vibration isolation layer can be constructed first, followed by the outer waterproof layer of the retaining wall, the top waterproof layer of the retaining wall, the inner waterproof layer of the retaining wall, and the side wall waterproof layer. After the vibration isolation layer is constructed, a 2.0mm thick anti-fluidization non-asphalt rubber waterproof coating is applied to it, followed by a 1.5mm thick SBS self-adhesive waterproof membrane. The membrane is laid while the release film is being removed, and air is expelled to avoid wrinkles and hollow areas. This method effectively protects the vibration isolation layer inside the waterproof layer, blocking the groundwater environment and effectively improving the service life of the side wall vibration isolation layer and retaining wall vibration isolation layer.

[0054] To further optimize the above technical solution, the foundation vibration isolation layer 14, the side wall vibration isolation layer 22, and the retaining wall vibration isolation layer 32 are composed of multiple polyurethane foam elastomer pads spliced ​​together. To ensure the integrity and sealing of the multiple polyurethane foam elastomer pads, a waterproof sealing strip is provided between adjacent polyurethane foam elastomer pads.

[0055] In some other specific embodiments, a brick protective wall 4 is provided on the outside of the side wall waterproof layer 23 and the retaining wall outer waterproof layer 33, arranged parallel to the basement outer wall 21.

[0056] In some other specific embodiments, a protective layer is embedded between the brick protective wall 4 and the side wall waterproof layer 23 and the retaining wall outer waterproof layer 33. The protective layer is made of polystyrene board. By setting the protective layer and the brick protective wall 4, the waterproof effect of the side wall waterproof layer 23 and the retaining wall outer waterproof layer 33 can be effectively guaranteed, thereby improving the service durability of the side wall vibration isolation layer 22 and the retaining wall vibration isolation layer 32.

[0057] This embodiment also discloses a construction method for a cantilevered roof structure with vibration isolation and waterproofing, including the following steps:

[0058] S1. A concrete cushion layer 11 is poured at the bottom of the foundation pit. After the concrete cushion layer 11 has set, the first waterproof layer 12 of the foundation is laid. The bottom of the foundation pit is the original soil compacted or the crushed stone cushion layer laid. In order to reduce construction costs, the concrete cushion layer 11 uses 100mm thick C20 plain concrete as a flat and hard base layer. The first waterproof layer 12 of the foundation uses 3mm thick polymer modified bitumen waterproof self-adhesive membrane bonded to the surface of the concrete cushion layer 11.

[0059] S2. Pour a concrete protective layer 13 on the first waterproof layer 12 of the foundation. After the concrete protective layer 13 has set, lay the foundation vibration isolation layer 14 and the second waterproof layer 15 of the foundation in sequence.

[0060] S3. Tie the bottom slab reinforcement and pour the bottom slab concrete. After the bottom slab 16 is completed, construct the basement structure 5. During the bottom slab reinforcement tying process, use concrete pads to support the bottom slab reinforcement to prevent it from piercing the second waterproof layer 15 of the foundation.

[0061] S4. Construct the side wall vibration isolation layer 22 and the side wall waterproof layer 23 sequentially on the outer wall surface of the basement exterior wall 21. After the basement structure 5 is completed, clean and level the outer surface of the basement exterior wall 21, then apply the side wall vibration isolation layer 22 with adhesive and seal the joints with waterproof tape. After the side wall waterproof layer 23 is completed, construct the side wall waterproof protective layer and brick protective wall 4, and then backfill the outer side of the basement exterior wall 21.

[0062] S5. Construct a cantilever retaining wall 31 around the top surface of the top slab of the basement structure 5; the cantilever retaining wall 31 shall be a brick masonry structure or a reinforced concrete structure.

[0063] S6. The outer wall surface of the cantilever retaining wall 31 shall be constructed with the retaining wall vibration isolation layer 32 and the outer waterproof layer 33 in sequence; after the outer waterproof layer 33 is constructed, the top waterproof layer 34 and the inner waterproof layer 35 shall be constructed.

[0064] S7. Backfill soil on both sides of the cantilever retaining wall 31 simultaneously. Backfilling soil on both sides of the cantilever retaining wall 31 simultaneously can prevent the wall from collapsing due to excessive pressure on one side.

[0065] To further optimize the above technical solution, when constructing the second waterproof layer 15 of the foundation, a margin of at least 400mm is left outside the range of the base slab 16. After the base slab 16 is poured, it is turned up so as to connect with the side wall waterproof layer 23.

[0066] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0067] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A roof cantilever building vibration isolation waterproof structure, which is arranged in the building foundation and the roof soil area of the basement, characterized in that, It includes the basic structure (1), the side wall structure (2) and the retaining wall structure (3); The foundation structure (1) consists of, from bottom to top, a concrete pad (11), a first waterproof layer (12), a foundation vibration isolation layer (14), a second waterproof layer (15), and a base plate (16); the side wall structure (2) includes an outer wall of the basement (21) and a side wall vibration isolation layer (22) and a side wall waterproof layer (23) sequentially bonded to the outer wall surface of the outer wall of the basement (21); the lower end face of the outer wall of the basement (21) is anchored to the top surface of the base plate (16); the side wall vibration isolation layer (22) is connected to the foundation vibration isolation layer (14), and the side wall waterproof layer (23) is connected to the first waterproof layer (12); The retaining wall structure (3) includes a top slab (36), a cantilever retaining wall (31), a retaining wall vibration isolation layer (32), an outer waterproof layer (33), a top waterproof layer (34), and an inner waterproof layer (35); the bottom surface of the top slab (36) is anchored to the upper end surface of the basement exterior wall (21); the cantilever retaining wall (31) is anchored to the top surface of the top slab (36) and is arranged corresponding to the basement exterior wall (21); the retaining wall vibration isolation layer (32) and the outer waterproof layer (33) are sequentially bonded to the first side wall of the cantilever retaining wall (31), and the retaining wall vibration isolation layer (32 ...4) are anchored to the top surface of the top slab (36), and the outer waterproof layer (35) is anchored to the top surface of the top slab (36), and the outer waterproof layer (32) and the outer waterproof layer (34) are anchored to the top surface of the top slab (36), and the outer waterproof layer (35) is anchored to the top surface of the top slab (36), and the outer waterproof layer (35) is anchored to the top surface of the top slab (36), and the outer waterproof layer (35) is anchored to the top surface of the top slab (36), and the outer waterproof layer (35) is anchored to the top surface of the top slab (36), and 32) Corresponding to the side wall vibration isolation layer (22), the outer waterproof layer (33) of the retaining wall corresponds to the side wall waterproof layer (23); the top surface of the top plate (36) is provided with a top plate waterproof layer (37); the top waterproof layer (34) of the retaining wall is provided on the top wall of the cantilever retaining wall (31); the inner waterproof layer (35) of the retaining wall is provided on the second side wall of the cantilever retaining wall (31) and connected to the top waterproof layer (34); the top waterproof layer (34) of the retaining wall is connected to the outer waterproof layer (33) of the retaining wall, and the inner waterproof layer (35) of the retaining wall is connected to the top plate waterproof layer (37); The number of basement exterior walls (21) is multiple, and the multiple basement exterior walls (21) together with the roof slab (36) form a basement structure (5); the top surface of the roof slab (36) has a building main structure (6), and there is a filling gap between the outer wall of the building main structure (6) and the second side wall of the cantilever retaining wall (31), and the filling gap is filled with backfill soil; The basic vibration isolation layer (14), the side wall vibration isolation layer (22) and the retaining wall vibration isolation layer (32) are spliced ​​together from multiple polyurethane foam elastomer pads; a waterproof sealing strip is provided between two adjacent polyurethane foam elastomer pads.

2. The roof cantilevered building vibration isolation waterproof structure according to claim 1, characterized in that, A concrete protective layer (13) is provided between the first waterproof layer (12) of the foundation and the vibration isolation layer (14) of the foundation.

3. The roof cantilevered building vibration isolation waterproof structure according to claim 2, characterized in that, The thickness of the concrete cushion layer (11) is not less than 100 mm; the thickness of the concrete protective layer (13) is not less than 50 mm.

4. The roof cantilevered building vibration isolation waterproof structure according to claim 1, characterized in that, The first waterproof layer (12) is a 3mm thick polymer-modified bitumen waterproof self-adhesive membrane; the second waterproof layer (15) is a 4mm thick polymer-modified bitumen pre-laid reverse-adhesive waterproof membrane.

5. The roof cantilevered building vibration isolation waterproof structure according to claim 1, characterized in that, A brick protective wall (4) is provided on the outside of the side wall waterproof layer (23) and the retaining wall outer waterproof layer (33), arranged parallel to the basement outer wall (21).

6. The construction method of a roof cantilever vibration isolation waterproof structure according to any one of claims 1 to 5, characterized in that, Includes the following steps: S1. Pour a concrete cushion layer (11) at the bottom of the foundation pit. After the concrete cushion layer (11) has set, lay the first waterproof layer (12) of the foundation. S2. Pour a concrete protective layer (13) on the first waterproof layer (12) of the foundation. After the concrete protective layer (13) has set, lay the foundation vibration isolation layer (14) and the foundation second waterproof layer (15) in sequence. S3. Tie the bottom slab reinforcement and pour the bottom slab concrete. After the bottom slab (16) is completed, construct the basement structure (5). S4. Construct the side wall vibration isolation layer (22) and the side wall waterproof layer (23) in sequence on the outer wall surface of the basement exterior wall (21); after the side wall waterproof layer (23) is completed, construct the side wall waterproof protective layer and brick protective wall (4), and then backfill the outer side of the basement exterior wall (21). S5. A cantilever retaining wall (31) is constructed circumferentially on the top surface of the top slab of the basement structure (5). S6. The outer wall of the cantilever retaining wall (31) is constructed with the retaining wall vibration isolation layer (32) and the outer waterproof layer (33) in sequence. After the outer waterproof layer (33) is completed, the top waterproof layer (34) and the inner waterproof layer (35) of the retaining wall are constructed. S7. Backfill soil on both sides of the cantilever retaining wall (31) at the same time.

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