Bidirectional vibration isolation and decoupling structure and construction method thereof

Abstract

The application discloses a bidirectional vibration reduction and isolation structure and a construction method thereof, and relates to the technical field of building vibration isolation. The bidirectional vibration reduction and isolation structure comprises an L-shaped groove, a horizontal vibration reduction and isolation component and a vertical vibration reduction and isolation component. The L-shaped groove comprises a horizontal groove and a vertical groove. The horizontal vibration reduction and isolation component is arranged on a gravel cushion layer of the horizontal groove. The horizontal vibration reduction and isolation component comprises a rubber material layer, a prefabricated reinforced concrete slab, a compression spring structure, a cast-in-place concrete slab and foam concrete which are sequentially arranged on the periphery of a pile foundation. The vertical vibration reduction and isolation component is arranged in the vertical groove. The vertical vibration reduction and isolation component comprises cast-in-place concrete walls which are cast on the inner walls of the vertical groove, EPS mixed materials which are filled between the cast-in-place concrete walls and water-resistant plates. The construction method of the bidirectional vibration reduction and isolation structure adopts an L-shaped vibration reduction and isolation structure, limits vibration waves in horizontal and vertical directions, and makes the vibration wave energy dissipate twice to reduce vibration influence.

Description

Technical Field

[0001] This invention relates to the field of building vibration isolation technology, and in particular to a bidirectional vibration reduction and isolation structure and its construction method. Background Technology

[0002] Urban rail transit has brought great convenience to people's travel, but the vibration and noise problems caused by rail transit cannot be ignored.

[0003] To mitigate the adverse effects of vibration, appropriate vibration reduction and isolation measures are necessary. For rail transit vibration, control can be achieved from three main aspects: the vibration source, the vibration propagation path, and the building itself.

[0004] However, current vibration reduction and isolation structures are mainly designed to control the vibration propagation path. In particular, vibration isolation trenches are the most common type of vibration reduction and isolation structure for rail transit. Vibration isolation trenches are further divided into filled vibration isolation trenches and empty vibration isolation trenches. However, the effectiveness of these vibration isolation trenches in controlling the vibration propagation path is still limited. Summary of the Invention

[0005] In view of this, the present invention provides a bidirectional vibration reduction and isolation structure and its construction method, which takes into account both the vibration source and the vibration propagation path when designing vibration reduction and isolation measures, and restricts the vibration wave in both horizontal and vertical directions, so that the vibration wave energy is dissipated twice and the vibration impact is reduced.

[0006] To address the aforementioned problems, the first objective of this invention is to provide a bidirectional vibration damping and isolation structure, disposed between a building and a vibration source and close to the building, the bidirectional vibration damping and isolation structure comprising:

[0007] The L-shaped trench includes a transverse trench and a vertical trench connected to the transverse trench on the side away from the pile foundation. The bottom of the transverse trench is covered with a crushed stone cushion layer.

[0008] A transverse vibration damping and isolation component is provided on the crushed stone cushion layer of the transverse trench. The transverse vibration damping and isolation component includes a rubber material layer, a precast reinforced concrete slab, a compression spring structure, a cast-in-place concrete slab, and foamed concrete arranged sequentially around the pile foundation.

[0009] A vertical vibration damping and isolation component is disposed in the vertical trench. The vertical vibration damping and isolation component includes a cast-in-place concrete wall cast on the inner wall of the vertical trench, an EPS composite material filled between the cast-in-place concrete wall and the EPS composite material, and a water-proof plate arranged on top of the cast-in-place concrete wall and the EPS composite material.

[0010] Preferably, the vertical trench is an inverted right-angled trapezoidal structure, and the inner wall of the vertical trench is provided with a plurality of evenly distributed anchor bolt channels, in which steel anchor bolts are inserted.

[0011] Preferably, the rubber material layer has a semi-circular arc structure, the inner arc radius of the semi-circular arc structure is equal to the pile radius of the pile foundation, and the thickness of the semi-circular arc structure is 30-50mm.

[0012] Preferably, the precast reinforced concrete slab is a precast reinforced concrete component, and the side of the precast reinforced concrete slab near the rubber material layer is provided with a plurality of small conical structures, which are adapted to tightly engage the precast reinforced concrete slab and the rubber material layer.

[0013] Preferably, the bottom radius of the small conical structure is 19-21 mm, the height is 14-16 mm, and the thickness of the precast reinforced concrete slab is 30-50 mm.

[0014] Preferably, the compression spring structure includes a large compression spring, a metal rod, a small compression spring, and a metal plate. The metal plate is vertically connected to the cast-in-place concrete slab and the precast reinforced concrete slab. Both ends of the large compression spring are connected to the metal plate. The metal rod is located inside the large compression spring. The small compression spring is connected to the end of the metal rod away from the pile foundation. The other end of the metal rod is connected to the metal plate. The end of the small compression spring away from the metal rod is connected to the metal plate.

[0015] Preferably, the thickness of the crushed stone cushion layer is 20-50cm, and the particle size is 30-50mm.

[0016] Preferably, the thickness of the cast-in-place concrete slab is 30-50cm, and the strength grade is not lower than C30.

[0017] Preferably, the connection between the compression spring structure and the precast reinforced concrete slab, the connection between the foamed concrete and the cast-in-place concrete wall, and the connection between the waterproofing plate and the cast-in-place concrete wall are all fixedly connected by bolts.

[0018] The second objective of this invention is to provide a construction method for a bidirectional vibration reduction and isolation structure, wherein the construction method includes the following steps based on the aforementioned bidirectional vibration reduction and isolation structure.

[0019] Select and determine the installation location of the bidirectional vibration reduction and isolation structure, and excavate an L-shaped trench;

[0020] After digging the L-shaped trench, level the bottom and four walls of the L-shaped trench, then lay a layer of crushed stone at the bottom of the horizontal trench of the L-shaped trench, and compact it.

[0021] A rubber material layer, a precast reinforced concrete slab, a compression spring structure, a cast-in-place concrete slab, and foamed concrete are sequentially connected around the periphery of the pile foundation.

[0022] Formwork is erected on both sides of the vertical trench of the L-shaped trench, and concrete is poured into the formwork to form a cast-in-place concrete wall;

[0023] After removing the formwork, fill the spaces between the cast-in-place concrete walls with EPS composite material and install a waterproofing board on top of the EPS composite material;

[0024] Waterproof mortar is poured into the pores of the waterproof board to form a road surface.

[0025] Compared with the prior art, the present invention has significant advantages and beneficial effects, specifically reflected in the following aspects:

[0026] In this invention, the bidirectional vibration damping and isolation structure consists of an L-shaped trench between the vibration source and the building, a horizontal vibration damping and isolation component, a vertical vibration damping and isolation component, and a crushed stone cushion layer. The L-shaped trench is composed of a horizontal trench and a vertical trench, with the vertical trench vertically connected to the side of the horizontal trench away from the pile foundation. A crushed stone cushion layer is laid at the bottom of the horizontal trench. The horizontal vibration damping and isolation component is located on the crushed stone cushion layer of the horizontal trench and consists of a rubber material layer, a precast reinforced concrete slab, a compression spring structure, a cast-in-place concrete slab, and foamed concrete arranged sequentially around the pile foundation, thus forming a vibration damping system at the vibration source. The vertical vibration damping and isolation component is located inside the vertical trench and consists of a cast-in-place concrete wall, EPS composite material, and a water-resistant plate. The cast-in-place concrete wall is cast on the inner wall of the vertical trench, the EPS composite material is filled between the cast-in-place concrete walls, and the water-resistant plate is arranged on top of the cast-in-place concrete wall and the EPS composite material, thus limiting the vibration waves in both the horizontal and vertical directions. Therefore, an L-shaped vibration reduction and isolation structure is adopted. When the vibration wave propagates to the inclined side of the vertical groove, it is reflected to the horizontal groove, so that the vibration wave energy is dissipated twice, reducing the vibration impact. Corresponding vibration reduction and isolation measures are arranged from both the vibration source and the vibration propagation path, so that the overall structure has a very significant vibration reduction and isolation effect. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall installation structure of the bidirectional vibration reduction and isolation structure in an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the main structure of the bidirectional vibration reduction and isolation structure in an embodiment of the present invention;

[0029] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at point AA;

[0030] Figure 4 This is a schematic diagram of the side structure of the precast reinforced concrete slab in an embodiment of the present invention;

[0031] Figure 5This is a schematic diagram of the compression spring structure in an embodiment of the present invention;

[0032] Figure 6 This is an exploded structural diagram of the compression spring structure in an embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram showing the detailed connection between the water-proof plate and the cast-in-place concrete wall in the vibration reduction and isolation structure of the present invention;

[0034] Figure 8 This is a schematic diagram of the construction method of the bidirectional vibration reduction and isolation structure in an embodiment of the present invention.

[0035] Explanation of reference numerals in the attached figures

[0036] 1-L-shaped groove; 11-Transverse groove; 12-Vertical groove;

[0037] 2- Lateral vibration damping and isolation components;

[0038] 21-Rubber material layer; 22-Precast reinforced concrete slab; 221-Small conical structure; 23-Compression spring structure; 231-Large compression spring; 232-Metal rod; 233-Small compression spring; 234-Metal plate; 2341-Bolt channel; 24-Cast-in-place concrete slab; 25-Foamed concrete;

[0039] 3-Vertical vibration damping and isolation components;

[0040] 31-Cast-in-place concrete wall; 32-EPS composite material; 33-Waterproof board;

[0041] 4- Crushed stone cushion layer; 5- Anchor bolt duct; 6- Steel anchor bolt; 7- Pile foundation; 8- Bolt. Detailed Implementation

[0042] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0043] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0044] Furthermore, if the embodiments of this invention involve descriptions such as "first," "second," and "third," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," and "third" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0045] Vibration-related problems are becoming increasingly widespread and numerous. Vibrations from production and daily life constantly affect our lives and even threaten many ancient buildings in my country that possess extremely high cultural and historical value and significant humanistic importance. Vibrations caused by construction or road work, and traffic are particularly prevalent.

[0046] Vibrational waves are vibrations that propagate outwards from a vibration source; they refer to elastic waves generated from a vibration source and radiating outwards. Based on their propagation mode, they can be classified into three types: longitudinal waves (P-waves), transverse waves (S-waves) (both longitudinal and transverse waves are body waves), and surface waves (L-waves). Surface waves are further divided into Rayleigh waves (R-waves) and Love waves, as defined below:

[0047] P-waves are waves in which the direction of soil particle vibration is the same as the direction of wave propagation; S-waves are waves in which the direction of soil particle vibration is perpendicular to the direction of wave propagation; R-waves are generated when the plane of soil particle vibration is perpendicular to the soil surface and propagates forward in an elliptical shape along the earth's surface; Loft waves are generated when the plane of soil particle vibration is parallel to the soil surface and are generally not generated. They only occur when the earth's surface is covered by a relatively soft soil layer.

[0048] Studies have found that vibration damages buildings primarily in the following three ways:

[0049] 1. Transverse waves cause buildings to sway horizontally, leading to damage and significant destructive force. They are equivalent to applying a reciprocating horizontal force to a building; when the magnitude and resulting deformation exceed the vibration resistance limit of the building's beams, the entire building will tilt or collapse, resulting in destruction.

[0050] 2. Longitudinal waves cause buildings to shake vertically, especially ancient buildings that are old and have poor vertical stability. When the vibration is large, the columns of the bottom layer, which are load-bearing structures, will instantly increase the dynamic load. When this load is added to the weight of the upper part, if it exceeds the bearing capacity of the bottom column, the bottom column will collapse, resulting in damage.

[0051] 3. Over a long period of time, buildings are affected by the disturbance of the foundation soil caused by surrounding vibration sources and the effects of low-frequency and micro-vibrations, which will cause permanent and irreversible fatigue damage to the buildings, resulting in a significant decrease in building safety.

[0052] Current vibration isolation trenches are a method of setting up vibration isolation barriers along the path of vibration waves to disrupt their propagation and cause energy loss, thereby reducing or even eliminating the impact of vibration waves on the protected building.

[0053] Current vibration isolation barriers are mainly divided into two categories: continuous vibration isolation barriers and discontinuous barriers. Among them:

[0054] Continuous vibration isolation barriers, typically represented by vibration isolation trenches, can effectively isolate vibrations from high-frequency artificial sources and ground motions. However, for some low-frequency sources with relatively long wavelengths, a deep trench is required as the isolation barrier, which presents significant challenges in actual construction. Conversely, using continuous walls as the isolation barrier would result in a massive workload and significantly increased construction costs, especially when the geological conditions at the construction site are poor. Furthermore, existing vibration reduction and isolation structures are designed solely to control the vibration propagation path, leading to inadequate vibration reduction and isolation effects.

[0055] To solve the above technical problems, such as Figure 1-7 As shown, an embodiment of the present invention provides a bidirectional vibration reduction and isolation structure, which is disposed between a building and the main vibration source and close to the building. The bidirectional vibration reduction and isolation structure includes an L-shaped groove 1, a horizontal vibration reduction and isolation component 2, and a vertical vibration reduction and isolation component 3, wherein:

[0056] The L-shaped trench 1 includes a horizontal trench 11 and a vertical trench 12. The vertical trench 12 is vertically connected to the side of the horizontal trench 11 away from the pile foundation 7. The bottom of the horizontal trench 11 is covered with a crushed stone cushion layer 4.

[0057] The transverse vibration reduction and isolation component 2 is installed on the crushed stone cushion layer 4 of the transverse trench 11. The transverse vibration reduction and isolation component 2 includes a rubber material layer 21, a precast reinforced concrete slab 22, a compression spring structure 23, a cast-in-place concrete slab 24, and a foamed concrete 25 arranged sequentially around the pile foundation.

[0058] The vertical vibration damping and isolation component 3 is installed in the vertical trench 12. The vertical vibration damping and isolation component 3 includes a cast-in-place concrete wall 31, an EPS composite material 32, and a water-proof plate 33. The cast-in-place concrete wall 31 is cast on the inner wall of the vertical trench 12, the EPS composite material 32 is filled between the cast-in-place concrete walls 31, and the water-proof plate 33 is arranged on top of the cast-in-place concrete wall 31 and the EPS composite material 32.

[0059] Specifically, please refer to Figures 1-5 As shown, in a specific embodiment of the present invention, a bidirectional vibration reduction and isolation structure is designed from both the vibration source and the vibration propagation path. The vibration reduction and isolation structure is set between the building and the main vibration source and on the side closer to the building. In this embodiment, the bidirectional vibration reduction and isolation structure consists of an L-shaped groove 1 between the vibration source and the building, a horizontal vibration reduction and isolation component 2, a vertical vibration reduction and isolation component 3, and a crushed stone cushion layer 4. It restricts the vibration wave in both horizontal and vertical directions. The L-shaped groove 1 is used so that when the vibration wave propagates to the inclined side of the vertical groove 12, it is damped once and then reflected into the filling groove of the horizontal groove 11. Under the action of the horizontal vibration reduction and isolation component 2, the vibration wave energy is consumed again. Finally, the vibration wave energy is dissipated twice, reducing the vibration impact and achieving a significant vibration reduction and isolation effect.

[0060] Since traditional vibration reduction and isolation structures are mainly designed to control the vibration propagation path, the most common vibration isolation trenches are divided into filled vibration isolation trenches and empty vibration isolation trenches. The effect of these vibration isolation trenches on vibration reduction and isolation measures in terms of controlling the vibration propagation path is still relatively limited.

[0061] The embodiment of the present invention adopts an L-shaped vibration reduction and isolation structure. When the vibration wave propagates to the inclined side of the vertical groove 12, it is reflected to the horizontal groove 11, so that the vibration wave energy is dissipated twice, reducing the vibration impact. Corresponding vibration reduction and isolation measures are arranged from both the vibration source and the vibration propagation path, so that the vibration reduction and isolation effect of the overall structure is very significant.

[0062] For further details, please refer to Figure 1 , 2 As shown, the vertical trench 12 is an inverted right trapezoidal structure, and several evenly distributed anchor bolt channels 5 are arranged on the inner wall of the vertical trench 12, with steel anchor bolts 6 inserted into the anchor bolt channels 5.

[0063] In the specific technical solution of this invention embodiment, anchor bolt holes 5 are provided on the inner wall of the vertical right-angled trapezoidal trench, and steel anchor bolts 6 are inserted into the anchor bolt holes 5. Grouting is carried out in the steel anchor bolts 6 until a cast-in-place concrete wall 31 is formed, and high-strength bolts 8 are pre-embedded on the top of the cast-in-place concrete wall 31 to complete the installation of the vertical vibration reduction and isolation component 3.

[0064] It is particularly important to emphasize that the two sides of the water-blocking plate 33 are provided with reserved bolt holes. The spacing of the reserved bolt holes is the same as the spacing of the embedded high-strength bolts, and the diameter of the reserved bolt holes is larger than the diameter of the embedded high-strength bolts.

[0065] For further details, please refer to Figure 1 , 2 As shown, the rubber material layer 21 has a semi-circular arc structure. The inner arc radius of the semi-circular arc structure is equal to the pile radius of the pile foundation 7, and the thickness of the semi-circular arc structure is 30-50mm.

[0066] Specifically, in some embodiments of the present invention, the rubber material layer 21 has a semi-circular arc structure with an arc radius equal to the pile radius, a thickness of 30-50 mm, and a height determined by the height of the transverse groove 11.

[0067] For further details, please refer to Figure 1 , 2 As shown in Figure 4, the precast reinforced concrete slab 22 is a precast reinforced concrete component. The side of the precast reinforced concrete slab 22 near the rubber material layer 21 is provided with several small conical structures 221. The small conical structures 221 are suitable for tightly interlocking the precast reinforced concrete slab 22 and the rubber material layer 21.

[0068] In other embodiments of the present invention, the precast reinforced concrete slab 22 is a precast reinforced concrete component, and the left side of the precast reinforced concrete slab 22 is designed with several small conical structures 221 to facilitate the tight interlocking of the precast reinforced concrete slab 22 and the rubber material layer 21.

[0069] For further details, please refer to Figure 1 , 2 As shown in Figure 4, the bottom radius of the small conical structure 221 is 19-21 mm, the height is 14-16 mm, and the thickness of the precast reinforced concrete slab 22 is 30-50 mm.

[0070] Preferably, the cone bottom radius of the small cone structure 221 is 20mm and the height is 15mm, the thickness of the precast reinforced concrete slab 22 is 30-50mm, and the height of the precast reinforced concrete slab 22 is determined by the height of the transverse groove 11.

[0071] For further details, please refer to Figure 2 , 5As shown in Figure 6, the compression spring structure 23 includes a large compression spring 231, a metal rod 232, a small compression spring 233, and a metal plate 234. The large compression spring 231 is horizontally located between the precast reinforced concrete slab 22 and the cast-in-place concrete slab 24. The metal rod 232 is horizontally connected to the precast reinforced concrete slab 22. The small compression spring 233 is connected between the metal rod 232 and the cast-in-place concrete slab 24. The metal plate 234 is vertically connected to the cast-in-place concrete slab 24 and the precast reinforced concrete slab 22. The metal rod 232 is located inside the large compression spring 231, and one side of the metal plate 234 is connected to the end of the small compression spring 233 away from the metal rod 232, while the other side of the metal plate 234 is connected to the end of the metal rod 232 away from the small compression spring 233.

[0072] Specifically, please refer to Figure 5 , 6 As shown, in some embodiments of the present invention, the compression spring structure 23 is a metal component, consisting of a large compression spring 231, a small compression spring 233, a metal rod 232, and a metal plate 234. The two ends of the large compression spring 231 are connected by the metal plate 234. Bolt holes 2341 are provided on the metal plate 234 near the precast reinforced concrete slab 22, and the bolt holes 2341 pre-embedded in the precast reinforced concrete slab 22 are fixedly connected to the metal plate 234 of the compression spring structure 23. The large compression spring 231 and the small compression spring 233 absorb the displacement at the vibration source, absorbing the energy caused by vibration in the horizontal direction, thus eliminating the generation of vibration waves at the source. Simultaneously, the protective structure of the metal rod 232 is protected from vertical deformation damage.

[0073] Furthermore, the thickness of the crushed stone cushion layer 4 is 20-50 cm, and the particle size is 30-50 mm. In some other embodiments of the present invention, the thickness of the crushed stone cushion layer 4 is preferably 30 cm, and the particle size is 40 mm.

[0074] Furthermore, the thickness of the cast-in-place concrete slab 24 is 30-50cm, and the strength grade is not lower than C30.

[0075] In some embodiments of the present invention, the thickness of the cast-in-place concrete slab 24 is preferably 40 cm, and the strength grade of the concrete is not lower than C30.

[0076] For further details, please refer to Figure 1 , 2 As shown in Figure 3, the connection between the compression spring structure 23 and the precast reinforced concrete slab 22, the connection between the foamed concrete 25 and the cast-in-place concrete wall 31, and the connection between the water-proof plate 33 and the cast-in-place concrete wall 31 are all fixedly connected by bolts 8.

[0077] In some embodiments of the present invention, foamed concrete 25 refers to a new type of lightweight material containing a large number of closed pores, which is formed by adding foaming agent to a slurry made of cementitious materials, admixtures, modifiers, brine, etc., and then mixing, pouring and molding, and naturally curing.

[0078] It should be noted that foamed concrete 25 is a new type of material that has a significant effect on the dissipation of vibration wave energy.

[0079] In this embodiment of the invention, high-strength bolts 8 are distributed at multiple component connections, such as at the connection between compression spring structure 23 and precast reinforced concrete slab 22, at the connection between foamed concrete 25 and cast-in-place concrete wall 31, and at the connection between waterproof plate 33 and cast-in-place concrete wall 31.

[0080] In specific implementation, bolts 8 are installed between the compression spring structure 23 and the precast reinforced concrete slab 22 for fixation; high-strength bolts 8 are pre-embedded in the foamed concrete 25 below the vertical trench 12, and the foamed concrete 25 is fixedly connected to the cast-in-place concrete wall 31 by the bolts 8; high-strength bolts 8 are pre-embedded in the top of the cast-in-place concrete wall 31, and the water-proof plate 33 is fixed to the cast-in-place concrete wall 31 by the bolts 8.

[0081] Preferably, in some embodiments of the present invention, the thickness of the cast-in-place concrete wall 31 is 30-50cm, and the strength grade of the concrete is not lower than C30.

[0082] Preferably, in some embodiments of the present invention, the horizontal spacing of the anchor bolt holes 5 is 2-3m, and the vertical spacing is 1-2m.

[0083] Specifically, in some embodiments of the present invention, EPS composite material 32 refers to a novel flexible material with good vibration isolation performance formed by mixing and stirring EPS granular material, waste tire granular material, fly ash, water and curing agent and casting it into shape.

[0084] Similarly, EPS composite material 32 is also a new type of material, which has a significant effect on the consumption of vibration wave energy.

[0085] Specifically, in some embodiments of the present invention, the water-proof plate 33 is made of a water-proof plastic material with a thickness of 30-50cm, which is a composite material and has a certain strength.

[0086] Please see Figure 8 As shown, another embodiment of the present invention also provides a construction method for a bidirectional vibration reduction and isolation structure, the construction method including the following steps;

[0087] Select and determine the installation location of the bidirectional vibration reduction and isolation structure, and excavate an L-shaped trench 1;

[0088] After digging the L-shaped trench 1, level the bottom and four walls of the L-shaped trench 1, and then lay a crushed stone cushion layer 4 at the bottom of the transverse trench 11 of the L-shaped trench 1, and compact it.

[0089] A rubber material layer 21, a precast reinforced concrete slab 22, a compression spring structure 23, a cast-in-place concrete slab 24, and a foamed concrete 25 are sequentially connected around the periphery of the pile foundation 7.

[0090] Templates are set up on both sides of the vertical trench 12 of the L-shaped trench 1, and concrete is poured into the templates to form a cast-in-place concrete wall 31;

[0091] After removing the formwork, EPS composite material 32 is filled between the cast-in-place concrete walls 31, and a waterproof board 33 is installed on top of the EPS composite material 32.

[0092] Waterproof mortar is injected into the pores of the waterproof barrier 33, so that the waterproof barrier 33 forms a road surface.

[0093] Therefore, the bidirectional vibration reduction and isolation structure is set as an L-shape, which has a good dissipation effect on vibration wave energy in both horizontal and vertical directions; at the same time, a rubber material layer 21 and a compression spring structure 23 are set at the vibration source position, and a filling groove is set at the vibration propagation path position to consume vibration wave energy from both horizontal and vertical directions, thereby reducing the adverse effects of vibration.

[0094] Specific implementation process:

[0095] First, select the location of the vibration reduction and isolation structure. After determining the location of the vibration reduction and isolation structure, excavate a trench and pile the excavated soil next to the trench for use as backfill soil.

[0096] When excavating L-shaped trench 1, first excavate the vertical right-angled trapezoidal trench and anchor bolt holes 5. After excavation, level the four walls of the vertical right-angled trapezoidal trench and take simple support measures to prevent collapse.

[0097] Then excavate the bottom horizontal trench 11 until the pile foundation 7 is reached. The long side of the vertical right-angled trapezoid is 5-6m and the short side is 3-4m. The thickness of the horizontal trench 11 is 1.2-2.0m. The overall excavation depth is determined by the depth of the building foundation.

[0098] After the trench is excavated, the bottom and four walls of the trench are leveled, and then a layer of crushed stone 4 is laid at the bottom of the trench, and then it is compacted by vibration.

[0099] The rubber material layer 21 is firmly fixed to the pile foundation 7 with glue. Then, the serrated side of the precast reinforced concrete slab 22 is inserted into the rubber material layer 21. High-strength bolts 8 and bolt holes are pre-embedded on the right side of the precast reinforced concrete slab 22. The compression spring structure 23 and the precast reinforced concrete slab 22 are connected with bolts 8. Then, concrete is poured into the template on the right side of the compression spring structure 23 to form a metal plate 234, so that the left structure forms a tight whole. After the poured concrete reaches 70% of the design strength, the template is removed. Foamed concrete 25 is poured on the right side of this whole, and high-strength bolts 8 are pre-embedded at the upper end of the foamed concrete 25.

[0100] Templates are erected on both sides of the vertical right-angled trapezoidal trench. Steel anchor rods 6 are inserted into the anchor rod channels 5 reserved in the original soil of the site. The diameter of the reserved anchor rod channels 5 needs to be larger than the diameter of the steel anchor rods 6. Then, cast-in-place concrete walls 31 are poured in the templates. The thickness of the cast-in-place concrete walls 31 is not less than 30cm. When pouring concrete, pre-embedded bolts 8 are set at the top. The horizontal spacing of the bolts 8 is 1-2m. At the same time, the anchor rod channels 5 in the original soil of the site are poured to make the soil on the side of the trench less prone to collapse.

[0101] After the concrete reaches 70% of its design strength, the formwork is removed, EPS composite material 32 is filled between the cast-in-place concrete walls 31, and then the water-resistant plate 33 is installed. The bolts 8 reserved at the top of the cast-in-place concrete wall 31 pass through the bolt holes reserved in the water-resistant plate 33, and the cast-in-place concrete wall 31 and the water-resistant plate 33 are fixed together with the bolts 8.

[0102] Finally, waterproof mortar is injected into the pores, and the water-proof board 33 forms the road surface to complete the construction of the vibration reduction and isolation structure.

[0103] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the scope of protection of this invention.

Claims

1. A bidirectional vibration isolation and decoupling structure provided between a building and a vibration source and close to one side of the building, characterized by, The bidirectional vibration isolation and reduction structure comprises: An L-shaped trench (1) comprising a horizontal trench (11) and a vertical trench (12) connected to the horizontal trench (11) away from a pile foundation (7), a bottom of the horizontal trench (11) being paved with a gravel cushion (4), the vertical trench (12) being an inverted right-angled trapezoidal structure with an inclined side arranged near the pile foundation (7); A horizontal vibration isolation and reduction assembly (2) arranged on the gravel cushion (4) of the horizontal trench (11), the horizontal vibration isolation and reduction assembly (2) comprising a rubber material layer (21), a prefabricated reinforced concrete slab (22), a compression spring structure (23), a cast-in-place concrete slab (24) and a foam concrete (25) arranged in sequence outside the pile foundation, the rubber material layer (21) being a semi-circular arc structure, an inner arc radius of the semi-circular arc structure being equal to a pile radius of the pile foundation (7); A vertical vibration isolation and reduction assembly (3) arranged in the vertical trench (12), the vertical vibration isolation and reduction assembly (3) comprising a cast-in-place concrete wall (31) cast on inner walls of the vertical trench (12), an EPS mixed material (32) filled between the cast-in-place concrete wall (31) and a waterproof board (33) arranged on top of the cast-in-place concrete wall (31) and the EPS mixed material (32).

2. The bidirectional reduced isolation structure of claim 1, wherein, The inner walls of the vertical trench (12) are arranged with a plurality of evenly distributed anchor rod channels (5), and steel anchor rods (6) are inserted into the anchor rod channels (5).

3. The bidirectional reduced-isolation structure of claim 1, wherein The thickness of the semi-circular arc structure is 30-50 mm.

4. The bidirectional reduced isolation structure according to any one of claims 1-3, characterized in that, The prefabricated reinforced concrete slab (22) is a prefabricated reinforced concrete member, and a side of the prefabricated reinforced concrete slab (22) close to the rubber material layer (21) is provided with a plurality of small conical structures (221) adapted to tightly engage the prefabricated reinforced concrete slab (22) and the rubber material layer (21).

5. The bidirectional reduced isolation structure of claim 4, wherein, The bottom radius of the small conical structure (221) is 19-21 mm, the height is 14-16 mm, and the thickness of the prefabricated reinforced concrete slab (22) is 30-50 mm.

6. The bidirectional reduced-isolation structure of claim 1, wherein The compression spring structure (23) comprises a large compression spring (231), a metal rod (232), a small compression spring (233) and a metal plate (234), the metal plate (234) being vertically connected to the cast-in-place concrete slab (24) and the prefabricated reinforced concrete slab (22), two ends of the large compression spring (231) being connected to the metal plate (234), the metal rod (232) being located in the large compression spring (231), the small compression spring (233) being connected to one end of the metal rod (232) away from the pile foundation (7), the other end of the metal rod (232) being connected to the metal plate (234), and one end of the small compression spring (233) away from the metal rod (232) being connected to the metal plate (234).

7. The bidirectional reduced-isolation structure of claim 1, wherein The thickness of the gravel cushion (4) is 20-50 cm, and the particle size is 30-50 mm.

8. The bidirectional reduced-isolation structure of claim 1, wherein The thickness of the cast-in-place concrete slab (24) is 30-50 cm, and the strength grade is not less than C30.

9. The bidirectional reduced-isolation structure of claim 1, wherein The connection part of the compression spring structure (23) and the prefabricated reinforced concrete slab (22), the connection part of the foam concrete (25) and the cast-in-place concrete wall (31), and the connection part of the waterproof board (33) and the cast-in-place concrete wall (31) are fixedly connected through bolts (8).

10. A method of constructing a bidirectional vibration isolation and / or decoupling structure according to any one of claims 1 to 9, characterised in that, The construction method comprises the steps of: Selecting a mounting position of a bidirectional vibration isolation structure, and excavating an L-shaped groove (1); After the L-shaped groove (1) is excavated, the bottom and four walls of the L-shaped groove (1) are leveled, a gravel cushion (4) is laid on the bottom of the transverse groove (11) of the L-shaped groove (1), and the gravel cushion (4) is vibrated, compacted and densified; The rubber material layer (21), the prefabricated reinforced concrete slab (22), the compression spring structure (23), the cast-in-place concrete slab (24) and the foam concrete (25) are connected in sequence on the periphery of the pile foundation (7); Forming the cast-in-place concrete wall (31) by supporting the formwork on both sides of the vertical groove (12) of the L-shaped groove (1) and pouring concrete in the formwork; After the formwork is removed, the EPS mixed material (32) is filled between the cast-in-place concrete walls (31), and the waterproof board (33) is installed on the top of the EPS mixed material (32); The waterproof board (33) forms the road surface by pouring waterproof mortar in the pores of the waterproof board (33).

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