Basement outer wall vibration isolation connecting structure and construction method

Abstract

The invention relates to a basement outer wall vibration isolation connecting structure and a construction method. The structure comprises a basement outer wall, a bracket, a polyurethane vibration isolation pad, a floor concrete beam plate and a horizontal connecting piece. The bracket is fixed to the inner side of the basement outer wall, the upper end face of the bracket is lower than the upper end face of the basement outer wall, a Z-shaped mounting table top is formed, and the polyurethane shock insulation pad is mounted along the Z-shaped mounting table top; a floor system peripheral ring beam is vertically arranged at the lower end of the floor system concrete beam plate, the outer side of the floor system peripheral ring beam and the lower end face of the floor system concrete beam plate form an L-shaped groove lap joint matched with a basement outer wall, the floor system concrete beam plate is fixed to the basement outer wall, and the lower end of the floor system peripheral ring beam is fixed to a bracket. And a basement exterior wall is connected through a horizontal connecting piece. Compared with the prior art, the method has the advantages that construction is easy and convenient, the whole structure has the overall embedding function, and the stress bearing capacity is high.

Description

Technical Field

[0001] This invention relates to the field of vibration isolation building structure technology, and in particular to a vibration isolation connection structure and construction method for basement exterior walls. Background Technology

[0002] As a new type of public transportation in cities, the subway has greatly improved the efficiency of citizens' daily travel and made a significant contribution to urban economic development. However, because subway operation can easily cause vibrations and secondary noise pollution to the surrounding environment, people living in buildings above subway stations often face certain health problems. Therefore, vibration isolation for subway-adjacent buildings is urgently needed.

[0003] Currently, the main vibration reduction technologies used in buildings are to install vibration isolation bearings above the foundation and to install double walls at the basement exterior walls. The basement exterior walls are retaining walls that are in contact with the soil, while the interior walls are separated from the basement exterior walls, thus preventing vibrations from being transmitted to the main structure through the basement exterior walls.

[0004] For example, utility model publication CN222648871U discloses a foundation vibration isolation structure suitable for basements adjacent to subway stations. The technical solution is as follows: the foundation vibration isolation structure includes a double base plate and a vibration damping pad. The double base plate includes an upper base plate and a lower base plate, and a vibration damping pad is set between the upper base plate and the lower base plate. The basement exterior wall and the retaining wall form a double wall. The basement exterior wall is connected to the upper base plate, and the retaining wall is connected to the lower base plate. The vibration damping pad extends upward and is laid between the basement exterior wall and the retaining wall. The pile heads of the tension piles are embedded in the lower base plate. A waterproof layer is set under the vibration damping pad, and the waterproof layer is set between the double base plate and the double wall. After the tension piles and the retaining wall are constructed, the pad, the lower base plate, the waterproof layer, the vibration damping pad, the upper base plate, and the basement exterior wall are formed sequentially from bottom to top.

[0005] This approach is beneficial for isolating vibration transmission, but the basement exterior walls are detached from the main structure, becoming cantilever walls, which poses significant design and construction challenges. Furthermore, the basement floor slabs cannot be directly connected to the basement exterior walls, preventing the walls from providing a secure anchoring function, which is detrimental to the overall structural load-bearing capacity and affects the load-bearing capacity of the basement exterior walls. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the existing technology, which is based on the high difficulty of design and construction and the limited load-bearing capacity of the basement exterior wall, and to provide a vibration isolation connection structure and construction method for basement exterior walls.

[0007] The objective of this invention can be achieved through the following technical solutions:

[0008] This solution provides a vibration isolation connection structure for basement exterior walls, including basement exterior walls, corbels, polyurethane vibration isolation pads, floor concrete beams and slabs, and horizontal connectors; the corbels are fixed to the inner side of the basement exterior walls, the upper end of the corbels is lower than the upper end of the basement exterior walls, and form a Z-shaped mounting platform, and the polyurethane vibration isolation pads are installed along the Z-shaped mounting platform.

[0009] The lower end of the concrete beam slab of the floor is vertically provided with a perimeter ring beam. The outer side of the perimeter ring beam and the lower end face of the concrete beam slab of the floor form an L-shaped groove that matches the basement exterior wall. The concrete beam slab of the floor is fixed to the basement exterior wall, and the lower end of the perimeter ring beam of the floor is fixed to the corbel and connected to the basement exterior wall through a horizontal connector.

[0010] Preferably, the horizontal connector includes an anchor bar, a steel sleeve, a PVC sleeve, and a bolt;

[0011] One end of the anchor bar is provided with an external thread, and the steel sleeve is provided with an internal thread. The anchor bar and the steel sleeve are threadedly connected and fixed in the basement exterior wall. The PVC sleeve is embedded in the perimeter ring beam of the floor slab. The bolt passes through the PVC sleeve and is connected to the threaded steel sleeve.

[0012] Preferably, the anchor bar and the steel sleeve are arranged horizontally, and the PVC sleeve and the steel sleeve are arranged coaxially.

[0013] Preferably, the PVC sleeve horizontally penetrates the perimeter ring beam of the floor slab, the head of the bolt is located on the side of the perimeter ring beam away from the basement exterior wall, and a rubber pad is provided between the head of the bolt and the perimeter ring beam of the floor slab.

[0014] Preferably, the outer side of the basement exterior wall in contact with the soil is covered with a waterproof layer.

[0015] Preferably, a waterproof layer is laid on the contact surface between the concrete beam and the soil around the floor slab, and a polyurethane vibration isolation pad is provided between the concrete beam and the waterproof layer.

[0016] Preferably, a rubber waterstop is provided on the contact surface between the basement exterior wall and the floor concrete beam slab, and the two ends of the rubber waterstop are respectively fixed inside the basement exterior wall and the floor concrete beam slab.

[0017] Preferably, the basement exterior wall and the corbel are cast integrally.

[0018] Preferably, the concrete beams and slabs of the floor slab and the perimeter ring beams of the floor slab are cast integrally.

[0019] This solution also provides a construction method for a vibration isolation connection structure for basement exterior walls. The horizontal connector includes anchor bars, steel sleeves, PVC sleeves, and bolts. The construction method includes the following steps:

[0020] S1: Tie the reinforcing bars of the basement exterior wall and corbel, place the anchor bars and steel sleeves at the preset positions on the basement exterior wall reinforcing bars, and pour the basement exterior wall and corbel.

[0021] S2: After the underground exterior walls and corbels are cured, the polyurethane vibration isolation pads will be arranged along the Z-shaped mounting platform;

[0022] S3: Tie the reinforcing bars of the concrete beams and slabs above the polyurethane vibration isolation pads and the perimeter ring beams of the floor slabs. Place the PVC sleeves on the reinforcing bars of the perimeter ring beams of the floor slabs and set them coaxially with the steel sleeves. Then pour the concrete beams and slabs of the floor slabs and the perimeter ring beams of the floor slabs.

[0023] S4: After the concrete beams and slabs of the floor slab and the surrounding ring beams of the floor slab are cured, the bolts are passed through the PVC sleeves and connected to the steel sleeves inside the basement exterior wall.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] (1) This scheme isolates the vibration transmission path from the basement exterior wall to the main structure using polyurethane vibration isolation pads, effectively reducing the impact of rail transit vibration on the main structure and avoiding the double-wall setup required in existing vibration isolation structures. The basement floor slab concrete beams and slabs are supported on the top of the corbels and the top of the basement exterior walls by polyurethane vibration isolation pads, which can effectively transfer vertical gravity loads. Furthermore, the perimeter ring beams of the floor slab and the sides of the basement exterior walls can effectively transfer horizontal pressure through polyurethane vibration isolation pads, and horizontal tension can be effectively transferred through vertical screen connectors. The basement floor slab concrete beams and slabs can still form an overall force transmission mechanism with the basement exterior walls, providing an overall embedded effect, ensuring the load-bearing capacity of the structure, and the overall structure is simple with low design and construction difficulty.

[0026] (2) In this scheme, the joint between the concrete beams and slabs of the floor and the outer wall of the basement is set on the side. A waterproof layer is laid on the contact surface between the outer wall of the basement, the beams and slabs and the soil. A rubber waterstop is fixed between the outer wall of the basement and the beams and slabs, so that the vibration isolation structure has a better waterproof effect. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the vibration isolation connection structure for the basement exterior wall provided by the present invention;

[0028] Figure 2 An enlarged view of the horizontal connector provided in this invention;

[0029] Figure 3 A flowchart of the construction method provided by the present invention;

[0030] In the diagram: 1. Basement exterior wall, 2. Corbel, 3. Polyurethane vibration isolation pad, 4. Concrete beam and slab of floor, 5. Horizontal connector, 6. Waterproof layer, 7. Rubber waterstop, 41. Perimeter ring beam of floor, 51. Anchor bar, 52. Steel sleeve, 53. PVC sleeve, 54. Bolt, 55. Rubber pad layer. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0034] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed during use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0036] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] Example 1

[0038] like Figure 1 and Figure 2 As shown, this embodiment provides a basement exterior wall vibration isolation connection structure, including a basement exterior wall 1, a corbel 2, a polyurethane vibration isolation pad 3, a floor concrete beam slab 4, and a horizontal connector 5; the corbel 2 is fixed to the inner side of the basement exterior wall 1, the upper end surface of the corbel 2 is lower than the upper end surface of the basement exterior wall 1, and forms a Z-shaped mounting platform, and the polyurethane vibration isolation pad 3 is installed along the Z-shaped mounting platform.

[0039] The lower end of the concrete beam slab 4 is vertically provided with a perimeter ring beam 41. The outer side of the perimeter ring beam 41 and the lower end face of the concrete beam slab 4 form an L-shaped groove that matches the basement exterior wall 1. The concrete beam slab 4 is fixed to the basement exterior wall 1, and the lower end of the perimeter ring beam 41 is fixed to the corbel 2 and connected to the basement exterior wall 1 through a horizontal connector 5.

[0040] By isolating the vibration transmission path from the basement exterior wall 1 to the main structure using polyurethane vibration isolation pads 3, the impact of rail transit vibration on the main structure is effectively reduced, avoiding the need for double walls at the basement exterior wall location in existing vibration isolation structures. The basement floor slab concrete beams 4 are supported on top of the corbels 2 and the basement exterior wall 1 by polyurethane vibration isolation pads 3, effectively transmitting vertical gravity loads. Furthermore, the perimeter ring beams 41 of the floor slab and the sides of the basement exterior wall 1 are effectively connected by polyurethane vibration isolation pads 3, effectively transmitting horizontal pressure. Horizontal tension is effectively transmitted through the vertical screen connectors 5. The basement floor slab concrete beams slab as a whole still forms an integrated force transmission mechanism with the basement exterior wall, providing overall fixation and ensuring the structure's load-bearing capacity. The overall structure is simple, with low design and construction difficulty.

[0041] In this embodiment, the horizontal connector 5 includes an anchor bar 51, a steel sleeve 52, a PVC sleeve 53, and a bolt 54;

[0042] One end of the anchor bar 51 is provided with an external thread, and the steel sleeve 52 is provided with an internal thread. The anchor bar 51 and the steel sleeve 52 are threadedly connected and fixed in the basement exterior wall 1. The PVC sleeve 53 is embedded in the perimeter ring beam 41 of the floor slab. The bolt 54 passes through the PVC sleeve 53 and is connected to the threaded steel sleeve 52.

[0043] Furthermore, the anchor bar 51 and the steel sleeve 52 are horizontally arranged, and the PVC sleeve 53 and the steel sleeve 52 are coaxially arranged. The PVC sleeve 53 horizontally penetrates the perimeter ring beam 41 of the floor slab, and the head of the bolt 54 is located on the side of the perimeter ring beam 41 away from the basement exterior wall 1. A rubber pad 55 is provided between the head of the bolt 54 and the perimeter ring beam 41 of the floor slab.

[0044] By pre-embedding and fixing the anchor bar 51 and steel sleeve 52 in the outer wall 1 after threaded connection, and pre-embedding the PVC sleeve 53 in the perimeter ring beam 41 of the floor slab, and threading the bolt 54 through the PVC sleeve 53 to the steel sleeve 52 to complete the bolt installation, the horizontal connection between the beam and the outer wall is realized, as well as the transmission of force and vibration in the horizontal direction. The overall structure is reliable and stable.

[0045] In a preferred embodiment, a waterproof layer 6 is laid on the outer side of the basement exterior wall 1 where it contacts the soil.

[0046] Furthermore, a waterproof layer is laid around the perimeter of the concrete beam slab 4 in contact with the soil, and a polyurethane vibration isolation pad is installed between the concrete beam slab 4 and the waterproof layer.

[0047] Among them, a rubber waterstop 7 is provided on the contact surface between the basement exterior wall 1 and the floor concrete beam slab 4, and the two ends of the rubber waterstop 7 are fixed in the basement exterior wall 1 and the floor concrete beam slab 4 respectively.

[0048] The joints between the concrete beams and slabs of the floor slab and the exterior walls of the basement are located on the side. A waterproof layer is laid on the contact surfaces between the basement exterior walls, beams and slabs and the soil. Rubber waterstops are fixed between the basement exterior walls and beams and slabs to give the vibration isolation structure a better waterproof effect.

[0049] In this embodiment, the basement exterior wall 1 and the corbel 2 are cast integrally. The floor slab concrete beams 4 and the floor perimeter ring beams 41 are cast integrally.

[0050] Specifically, the basement exterior wall vibration isolation connection structure includes the basement concrete exterior wall, concrete corbel, polyurethane vibration isolation pad, basement floor concrete beams and slabs, basement floor perimeter ring beams, rubber waterstop, steel sleeve, anchor bar, high-strength bolts and PVC sleeve.

[0051] The basement's concrete exterior walls and corbels are integrally cast. The corbels are located on the interior side of the basement's concrete exterior walls. A perimeter ring beam is installed at the junction of the basement floor slab and the basement exterior walls. The basement floor slab and its perimeter ring beam are integrally cast. The basement floor slab rests on the corbels via the perimeter ring beams. The basement floor slab rests on the top of the basement exterior walls via overhanging floor slabs. Polyurethane vibration damping pads are laid at the contact surfaces between the perimeter ring beams and the corbels, at the contact surfaces between the overhanging floor slabs and the top of the basement exterior walls, and at the contact surfaces between the perimeter ring beams and the sides of the basement exterior walls.

[0052] One end of the anchor bar is threaded and connected to the other end of the steel sleeve via a threaded connection. The anchor bar and steel sleeve, after being connected, form a whole and are pre-embedded in the basement exterior wall. The PVC sleeve is pre-embedded in the surrounding ring beam and extends horizontally through the ring beam. The PVC sleeve and the pre-embedded steel sleeve are aligned at their centers. A rubber pad is placed over the entire length of the high-strength bolt in the non-nut and non-threaded areas to reduce vibration transmission with the PVC sleeve. The high-strength bolt passes through the PVC sleeve, with a nut at one end and a thread at the other. The threaded end of the high-strength bolt connects to the sleeve pre-embedded in the basement exterior wall. The high-strength bolt can be fixed after the foundation and lower slab concrete have been poured and reached strength. A certain torque is applied to the nut for fixing; the torque should be controlled to be small to avoid the formation of vibration sound bridges. A rubber pad is placed at the contact point between the nut and the ring beam to reduce vibration transmission. Rubber waterstops are installed at the locations where the extended floor slab rests with the top of the basement exterior wall to enhance waterproofing. The entire surface of the basement exterior wall in contact with the soil is covered with a waterproof layer.

[0053] Example 2

[0054] This embodiment is basically the same as Embodiment 1, with the following difference: Figure 3 As shown in the figure, this embodiment provides a construction method for a vibration isolation connection structure for a basement exterior wall. The horizontal connector 5 includes an anchor bar 51, a steel sleeve 52, a PVC sleeve 53, and a bolt 54. The construction method includes the following steps:

[0055] S1: Tie the reinforcing bars of the basement exterior wall 1 and corbel 2, place the anchor bar 51 and steel sleeve 52 at the preset positions on the reinforcing bars of the basement exterior wall 1, and pour the basement exterior wall 1 and corbel 2.

[0056] S2: After the underground exterior wall 1 and corbel 2 are cured, the polyurethane vibration isolation pad 3 will be arranged along the Z-shaped mounting platform;

[0057] S3: Tie the reinforcing bars of the floor concrete beam slab 4 and the floor perimeter ring beam 41 above the polyurethane vibration isolation pad 3, place the PVC sleeve 53 on the reinforcing bars of the floor perimeter ring beam 41 and set it coaxially with the steel sleeve 52, and pour the floor concrete beam slab 4 and the floor perimeter ring beam 41.

[0058] S4: After the concrete beams and slabs 4 and the perimeter ring beams 41 of the floor slab are cured, the bolts 54 are passed through the PVC sleeves 53 and connected to the steel sleeves 53 inside the basement exterior wall 1.

[0059] By integrally casting the exterior walls and horns, as well as the concrete beams and slabs 4 and the perimeter ring beams 41 of the floor slab, the concrete beams and slabs of the basement floor slab can still form an integral force transmission mechanism with the basement exterior walls, and have an integral embedding effect, which further improves the load-bearing capacity of the vibration isolation structure.

[0060] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A vibration isolation connection structure for basement exterior walls, characterized in that, It includes a basement exterior wall (1), corbels (2), polyurethane vibration isolation pads (3), floor concrete beams and slabs (4), and horizontal connectors (5); the corbels (2) are fixed to the inside of the basement exterior wall (1), the upper end of the corbels (2) is lower than the upper end of the basement exterior wall (1), and form a Z-shaped mounting platform, and the polyurethane vibration isolation pads (3) are installed along the Z-shaped mounting platform; The lower end of the concrete beam slab (4) of the floor is vertically provided with a perimeter ring beam (41). The outer side of the perimeter ring beam (41) and the lower end face of the concrete beam slab (4) of the floor form an L-shaped groove that matches the basement exterior wall (1). The concrete beam slab (4) of the floor is fixed on the basement exterior wall (1). The lower end of the perimeter ring beam (41) of the floor is fixed on the corbel (2) and connected to the basement exterior wall (1) through a horizontal connector (5).

2. The vibration isolation connection structure for basement exterior walls according to claim 1, characterized in that, The horizontal connector (5) includes an anchor bar (51), a steel sleeve (52), a PVC sleeve (53), and a bolt (54); One end of the anchor bar (51) is provided with an external thread, and the steel sleeve (52) is provided with an internal thread. The anchor bar (51) and the steel sleeve (52) are threaded together and fixed in the basement exterior wall (1). The PVC sleeve (53) is embedded in the perimeter ring beam (41) of the floor slab. The bolt (54) passes through the PVC sleeve (53) and is connected to the threaded steel sleeve (52).

3. The vibration isolation connection structure for basement exterior walls according to claim 2, characterized in that, The anchor bar (51) and the steel sleeve (52) are arranged horizontally, and the PVC sleeve (53) and the steel sleeve (52) are arranged coaxially.

4. The vibration isolation connection structure for basement exterior walls according to claim 2, characterized in that, The PVC sleeve (53) is horizontally inserted through the perimeter ring beam (41) of the floor slab. The head of the bolt (54) is located on the side of the perimeter ring beam (41) away from the basement exterior wall (1). A rubber pad (55) is provided between the head of the bolt (54) and the perimeter ring beam (41).

5. The vibration isolation connection structure for basement exterior walls according to claim 1, characterized in that, The outer side of the basement exterior wall (1) in contact with the soil is covered with a waterproof layer (6).

6. The vibration isolation connection structure for basement exterior walls according to claim 1, characterized in that, A waterproof layer is laid around the perimeter of the concrete beam slab (4) in contact with the soil, and a polyurethane vibration isolation pad is provided between the concrete beam slab (4) and the waterproof layer.

7. The vibration isolation connection structure for basement exterior walls according to claim 1, characterized in that, A rubber waterstop (7) is provided on the contact surface between the basement exterior wall (1) and the floor concrete beam slab (4), and the two ends of the rubber waterstop (7) are respectively fixed inside the basement exterior wall (1) and the floor concrete beam slab (4).

8. The vibration isolation connection structure for basement exterior walls according to claim 1, characterized in that, The basement exterior wall (1) and the corbel (2) are cast integrally.

9. The vibration isolation connection structure for basement exterior walls according to claim 1, characterized in that, The concrete beams and slabs (4) of the floor slab and the perimeter ring beams (41) of the floor slab are cast as a single unit.

10. A construction method for a basement exterior wall vibration isolation connection structure based on any one of claims 1-9, characterized in that, The horizontal connector (5) includes an anchor bar (51), a steel sleeve (52), a PVC sleeve (53), and a bolt (54). The construction method includes the following steps: S1: Tie the reinforcing bars of the basement exterior wall (1) and corbel (2), place the anchor bar (51) and steel sleeve (52) at the preset positions on the reinforcing bars of the basement exterior wall (1), and pour the basement exterior wall (1) and corbel (2); S2: After the underground exterior wall (1) and corbel (2) are cured, the polyurethane vibration isolation pad (3) will be arranged along the Z-shaped mounting platform; S3: Tie the reinforcing bars of the floor concrete beam slab (4) and the floor perimeter ring beam (41) above the polyurethane vibration isolation pad (3), place the PVC sleeve (53) on the reinforcing bars of the floor perimeter ring beam (41) and set it coaxially with the steel sleeve (52) to pour the floor concrete beam slab (4) and the floor perimeter ring beam (41). S4: After the concrete beams and slabs (4) and the perimeter ring beams (41) of the floor are cured, the bolts (54) are passed through the PVC sleeves (53) and connected to the steel sleeves (53) inside the basement exterior wall (1).

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