Multi-arc-shaped vibration reduction and isolation structure and construction method thereof

Abstract

The invention discloses a multi-arc-shaped vibration reduction and isolation structure and a construction method thereof, and relates to the technical field of building vibration isolation, the multi-arc-shaped vibration reduction and isolation structure comprises a groove, the groove is arranged between a vibration source and a building, and a plurality of steel plates, a prefabricated reinforced concrete plate, a prefabricated elastic material plate and a cast-in-place concrete plate are horizontally and sequentially arranged in the groove; the steel plates are horizontally arranged on the side wall, close to the vibration source, of the groove, and each steel plate is arc-shaped; one end of each anchor rod assembly penetrates through the prefabricated reinforced concrete plate and the prefabricated elastic material plate, and the other end of each anchor rod assembly is embedded into the cast-in-place concrete plate. Vibration waves are blocked through the circular-arc-shaped steel plates, multi-angle reflection and refraction are generated when the vibration waves make contact with the steel plates, the vibration isolation effect is provided, the rigid materials and the elastic materials are alternately arranged in the grooves, the vibration isolation effect is further improved, the defects of vibration isolation empty grooves and vibration isolation groove filling are overcome, the structure is stable, and the vibration isolation effect is good. And the vibration isolation effect is better than that of filling a vibration isolation trench.

Description

Technical Field

[0001] The invention relates to the technical field of building vibration isolation, and in particular to a multi-arc vibration reduction and isolation structure and a construction method thereof. Background Art

[0002] At present, with the continuous development and progress of the world, the role of rail transit in cities has become increasingly important, bringing great convenience to people's travel, but the vibration and noise problems caused by rail transit cannot be ignored. Therefore, while enjoying the convenience brought by rail transit, it is necessary to study how to reduce its impact on humans, high-precision instruments and buildings.

[0003] In order to reduce the adverse effects of vibration, appropriate vibration reduction and isolation measures need to be taken. The vibration of rail transit can be controlled from three aspects: the vibration source, the vibration propagation path, and the building itself. Since the vibration problem caused by rail transit was not fully considered when constructing buildings and transportation infrastructure in the early days, controlling vibration propagation has become an extremely important means.

[0004] At present, the common vibration isolation structures include vibration isolation trenches, which are divided into filled vibration isolation trenches and empty vibration isolation trenches. However, both have disadvantages. Empty vibration isolation trenches are prone to collapse and water accumulation, which affects road traffic and is difficult to maintain in the later stage. The vibration isolation effect of filled vibration isolation trenches is not as good as that of empty vibration isolation trenches. Summary of the invention

[0005] The purpose of the present invention is to solve the problems in the prior art and to propose a multi-arc vibration reduction and isolation structure which is convenient to construct, easy to maintain and has good vibration reduction and isolation effects and a construction method thereof.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A multi-arc vibration reduction and isolation structure is used for vibration reduction and isolation between a vibration source and a building, comprising:

[0008] A groove is arranged between the vibration source and the building, and a steel plate, a prefabricated reinforced concrete plate, a prefabricated elastic material plate and a cast-in-place concrete plate are arranged horizontally in the groove in sequence. A plurality of steel plates are arranged horizontally on a side wall of the groove close to the vibration source, and each steel plate is arc-shaped;

[0009] A plurality of anchor rod assemblies, one end of each anchor rod assembly penetrates the prefabricated reinforced concrete slab and the prefabricated elastic material slab, and the other end is embedded in the cast-in-place concrete slab;

[0010] and a water blocking plate, which is arranged at the top of the groove.

[0011] Furthermore, each steel plate is semicircular in shape, and the inner side of the arc faces the precast reinforced concrete slab, so that there is a gap between each steel plate and the precast reinforced concrete slab.

[0012] Furthermore, the height of each steel plate is the same as the height of the groove.

[0013] Furthermore, a crushed stone cushion layer is provided at the bottom of the trench, and the prefabricated reinforced concrete slab, the prefabricated elastic material slab and the cast-in-place concrete slab are located above the crushed stone cushion layer.

[0014] Furthermore, the anchor rod assembly includes an anchor rod, and anchor rod holes are opened on the side walls of the prefabricated reinforced concrete plate and the prefabricated elastic material plate. The anchor rod passes through the anchor rod hole, and the diameter of the anchor rod hole needs to be larger than the diameter of the anchor rod.

[0015] Furthermore, the anchor rod assembly also includes a gasket and a nut, one end of the anchor rod extends to the outside of the precast reinforced concrete slab, and the other end is embedded in the interior of the cast-in-place concrete slab, and the nut and the gasket are fixedly connected to the end of the anchor rod extending to the outside of the precast reinforced concrete slab.

[0016] Furthermore, a plurality of tenons are provided at the bottom of the water barrier, and tenons are provided at the tops of the prefabricated reinforced concrete slab and the cast-in-place concrete slab, and each tenon can be inserted into a tenon groove.

[0017] Furthermore, the bottom end of the tenon is an isosceles trapezoid, the tenon groove is a metal tenon groove, and the top end of the tenon groove is matched with the bottom end of the tenon.

[0018] Furthermore, the width of the water blocking plate is greater than the width of the groove, and the upper surface of the water blocking plate is flush with the upper surface of the groove.

[0019] In addition, with respect to the above-mentioned multi-arc vibration reduction and isolation structure, the present invention also provides a construction method of the multi-arc vibration reduction and isolation structure, comprising the following steps:

[0020] S1: Dig a trench on the original soil between the vibration source and the building;

[0021] S2: Use static pressure construction on one side of the trench to drive the steel plate into the bottom of the trench;

[0022] S3: Level the bottom and four walls of the trench, lay a crushed stone cushion at the bottom of the trench, and then vibrate and compact it;

[0023] S4: inserting the anchor rod into the anchor rod holes of the precast reinforced concrete slab and the precast elastic material slab, one end of the anchor rod protrudes out of the precast reinforced concrete slab and is fixed with a nut and a gasket, and the other end of the anchor rod protrudes out of the precast elastic material slab, and then placing the precast reinforced concrete slab and the precast elastic material slab into the groove and arranging them close to the steel plate;

[0024] S5: A template is supported on one side of the prefabricated elastic material plate, and prestress is applied to one end of the anchor rod extending out of the prefabricated elastic material plate and fixed on the template, and then concrete is poured in the template to form a cast-in-place concrete slab. At the same time, the anchor rod hole is poured to connect and fix the prefabricated reinforced concrete slab and the prefabricated elastic material slab with the cast-in-place concrete slab. The template is removed after the cast-in-place concrete slab reaches the designed strength;

[0025] S6: Set up a formwork above the trench for sealing, then pour waterproof mortar at the bottom of the trench, and finally install the baffle, connect the tenon at the bottom of the baffle with the mortise and tenon at the top of the precast reinforced concrete slab and the cast-in-place concrete slab, and finally form the road surface with the baffle to complete the construction of the vibration reduction and isolation structure.

[0026] The beneficial effects of the present invention are:

[0027] In the present invention, the multi-arc vibration reduction and isolation structure blocks the vibration waves through multiple arc-shaped steel plates, so that the vibration waves are reflected and refracted at multiple angles when they contact the arc-shaped steel plates, providing a better vibration isolation effect. In addition, the steel plates, empty grooves, prefabricated reinforced concrete plates, prefabricated elastic material plates and cast-in-place concrete plates are arranged horizontally in sequence inside the grooves, forming an alternating arrangement of rigid materials and elastic materials. When the vibration waves encounter different media underground, the greater the difference between the media, the easier it is for the vibration surface waves to reflect and difficult to pass through the medium interface, thereby further improving the vibration isolation effect of the vibration reduction and isolation structure, overcoming the respective shortcomings of the vibration isolation empty grooves and the filled vibration isolation grooves, and having a stable structure and better vibration isolation effect than the filled vibration isolation grooves.

[0028] A water-blocking plate is used on the top of the overall structure and a crushed stone cushion is used on the bottom, so that the vibration reduction and isolation structure has good waterproof and hydrophobic properties;

[0029] The use of steel anchor rods to prestress the prefabricated reinforced concrete slabs, prefabricated elastic material slabs and cast-in-place concrete slabs makes the overall structure more stable;

[0030] The tenon at the bottom of the baffle and the tenon groove at the top of the precast reinforced concrete slab and the cast-in-place concrete slab are connected by mortise and tenon joints, which makes the baffle and the lower structure more tightly connected and prevents the structure from moving up and down;

[0031] Most of the components in the vibration reduction and isolation structure, such as prefabricated reinforced concrete slabs and prefabricated elastic material slabs, are prefabricated components and can be processed in advance in the factory, thereby improving construction efficiency and making construction and maintenance more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A top view of the structure of a multi-arc vibration reduction and isolation structure proposed by the present invention;

[0033] Figure 2A side structural cross-sectional view of a multi-arc vibration reduction and isolation structure proposed by the present invention;

[0034] Figure 3 A schematic diagram of the structure of an anchor rod assembly of a multi-arc vibration reduction and isolation structure proposed by the present invention;

[0035] Figure 4 A schematic diagram of the cross-sectional structure of the tenon and the tenon groove of a multi-arc vibration reduction and isolation structure proposed by the present invention;

[0036] Figure 5 This is a schematic cross-sectional structure diagram of a multi-arc vibration reduction and isolation structure proposed by the present invention when the tenon and the tenon groove are not connected.

[0037] In the figure: 1 groove, 2 steel plate, 3 prefabricated reinforced concrete slab, 4 cast-in-place concrete slab, 5 prefabricated elastic material slab, 6 water-blocking board, 7 crushed stone cushion, 801 tenon, 802 tenon groove, 9 anchor rod assembly, 901 nut, 902 gasket, 903 anchor rod, 10 anchor rod hole. DETAILED DESCRIPTION

[0038] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0039] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0040] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0041] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0042] Reference Figure 1-5, a multi-arc vibration reduction and isolation structure, is used for vibration reduction and isolation between the vibration source and the building, reducing the vibration impact of the vibration source on the nearby buildings.

[0043] The multi-arc vibration reduction and isolation structure and the construction method thereof include a groove 1, a steel plate 2, a prefabricated reinforced concrete plate 3, a prefabricated elastic material plate 5, a cast-in-place concrete plate 4, a plurality of anchor rod assemblies 9 and a water-blocking plate 6;

[0044] The trench 1 is set on the original soil of the site between the vibration source and the building. A crushed stone cushion layer 7 is provided at the bottom of the trench 1. The thickness of the crushed stone cushion layer is 20cm-50cm and the particle size is 30mm-50mm. The precast reinforced concrete slab 3, the precast elastic material slab 5 and the cast-in-place concrete slab 4 are located above the crushed stone cushion layer 7, and the steel plate 2, the precast reinforced concrete slab 3, the precast elastic material slab 5 and the cast-in-place concrete slab 4 are horizontally arranged in sequence inside the trench 1.

[0045] A plurality of steel plates 2 are provided, each of which is horizontally arranged on a side wall of the groove 1 close to the vibration source. Each steel plate 2 is semicircular in shape, and the inner side of the arc faces the precast reinforced concrete slab 3, so that there is a gap between the semicircular steel plate 2 and the precast reinforced concrete slab 3 to form a vibration isolation groove. The height of each steel plate 2 is the same as the height of the groove 1, and the arc radius of each steel plate 2 is 30cm-50cm, and the thickness is 30mm-50mm.

[0046] The prefabricated reinforced concrete slab 3 is a prefabricated reinforced concrete component with a thickness of 30cm-50cm, and the strength grade of the concrete is not less than C30. The thickness of the cast-in-place concrete slab 4 is 30cm-50cm, and the strength grade of the concrete is not less than C30. The thickness of the prefabricated elastic material plate 5 is 30cm-50cm, and the elastic material can be EPS particles, waste tire particles, fly ash, water and curing agent, etc.

[0047] The anchor assembly 9 includes an anchor 903, a gasket 902 and a nut 901. Anchor holes 10 are opened on the side walls of the precast reinforced concrete slab 3 and the precast elastic material slab 5. The anchor holes 10 are spaced 2m-3m horizontally and 1m-2m vertically. Each anchor 903 passes through an anchor hole 10, and the diameter of the anchor hole 10 needs to be larger than the diameter of the anchor 903. One end of the anchor 903 extends to the outside of the precast reinforced concrete slab 3, and the nut 901 and the gasket 902 are fixedly connected to the end of the anchor 903 extending to the outside of the precast reinforced concrete slab 3. The other end of the anchor 903 is embedded in the interior of the cast-in-place concrete slab 4, so that the anchor assembly 9 fixes the precast reinforced concrete slab 3, the precast elastic material slab 5 and the cast-in-place concrete slab 4 together.

[0048] The bottom of the water barrier 6 is provided with a plurality of tenons 801, which are arranged at intervals of 1m-2m. The tops of the prefabricated reinforced concrete slab 3 and the cast-in-place concrete slab 4 are provided with tenons 802. The tenons 801 and the tenons 802 are both prefabricated from metal materials. The metal tenons 801 are embedded in the water barrier 6 when it is manufactured, and the metal tenons 802 are embedded in the cast-in-place concrete slab 4 when it is cast. The bottom end of the tenon 801 is an isosceles trapezoid, and the top end of the tenon 802 is aligned with the top of the tenon 801. The bottom end is adapted so that each tenon 801 can be inserted laterally into a mortise 802, so that the watertight board 6 is fixed to the top of the groove 1. The mortise and tenon connection method makes the watertight board 6 and the lower structure tightly connected to prevent the watertight board 6 from moving up and down, and the width of the watertight board 6 is greater than the width of the groove 1. The upper surface of the watertight board 6 is flush with the upper surface of the groove 1, so that the watertight board 6 forms a road surface. The watertight board adopts a waterproof plastic material with a thickness of 30cm-50cm.

[0049] Example 2

[0050] The present invention also provides a construction method of a multi-arc vibration reduction and isolation structure, which is applied to the construction of the multi-arc vibration reduction and isolation structure, and comprises the following steps:

[0051] S1: First, select the location of the vibration reduction and isolation structure. After determining the location of the structure, dig trench 1. The excavated soil is piled next to trench 1 as backfill soil. The excavation method of trench 1 is to dig two layers in two times. First, dig the first layer, and the depth of the first layer reaches 30cm;

[0052] S2: Use static pressure construction to drive the steel plate 2 into the bottom of the first layer of trench 20cm away from one side of the first layer of trench, and then excavate along the side of the steel plate 2 close to the first layer of trench. The overall excavation depth is determined by the depth of the building foundation. The width of trench 1 is 1.2m-2.0m;

[0053] S3: Level the bottom and four walls of the trench 1, lay a crushed stone cushion layer 7 at the bottom of the trench 1, the crushed stone cushion layer has a thickness of 20cm-50cm and a particle size of 30mm-50mm, and then perform vibration compaction;

[0054] S4: insert the anchor rod 903 into the anchor rod hole 10 of the precast reinforced concrete slab 3 and the precast elastic material slab 5, one end of the anchor rod 903 extends 5 cm from one side of the precast reinforced concrete slab 3, and is fixed with a nut 901 and a steel gasket 902, and the other end of the anchor rod 903 extends 10 cm from one side of the precast elastic material slab 5, and then put the precast reinforced concrete slab 3 and the precast elastic material slab 5 into the groove 1 and arrange them close to the steel plate 2;

[0055] S5: A formwork is supported on one side of the prefabricated elastic material plate 5, and prestress is applied to one end of the anchor rod 903 extending out of the prefabricated elastic material plate 5 and fixed on the formwork, and then concrete is poured in the formwork, and the thickness of the cast-in-place concrete is not less than 30 cm to form a cast-in-place concrete plate 4. At the same time, the anchor rod hole 10 is poured to connect and fix the prefabricated reinforced concrete plate 3 and the prefabricated elastic material plate 5 to the cast-in-place concrete plate 4, and when pouring concrete, a pre-buried metal mortise and tenon groove 802 is set at the top of the cast-in-place concrete plate 4, and the horizontal spacing is 1m-2m. After the cast-in-place concrete plate reaches 70% of the design strength, the formwork is removed;

[0056] S6: Set up a formwork above the groove 1 for sealing, then pour waterproof mortar at the bottom of the groove 1, and finally install the baffle 6. Insert the tenon 801 at the bottom of the baffle 6 into the tenon groove 802 at the top of the precast reinforced concrete slab 3 and the cast-in-place concrete slab 4 horizontally for docking. The mortise and tenon connection method makes the baffle 6 and the lower structure tightly connected to prevent the baffle 6 from moving up and down. Finally, the baffle 6 forms a road surface to complete the construction of the vibration reduction and isolation structure.

[0057] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multi-arc vibration reduction and isolation structure, used for vibration reduction and isolation between a vibration source and a building, characterized in that: include: A groove (1) is arranged between a vibration source and a building, wherein a steel plate (2), a prefabricated reinforced concrete plate (3), a prefabricated elastic material plate (5) and a cast-in-place concrete plate (4) are arranged horizontally in sequence inside the groove (1), wherein a plurality of steel plates (2) are arranged, each of the steel plates (2) is arranged horizontally on a side wall of the groove (1) close to the vibration source, and each of the steel plates (2) is arc-shaped; A plurality of anchor rod assemblies (9), one end of each of the anchor rod assemblies (9) passes through the prefabricated reinforced concrete slab (3) and the prefabricated elastic material slab (5), and the other end is embedded in the interior of the cast-in-place concrete slab (4); and a water blocking plate (6) which is arranged at the top of the groove (1).

2. The multi-arc vibration reduction and isolation structure according to claim 1, characterized in that: Each of the steel plates (2) is semicircular in shape, and the inner side of the arc faces the prefabricated reinforced concrete slab (3), so that a gap exists between each of the steel plates (2) and the prefabricated reinforced concrete slab (3).

3. The multi-arc vibration reduction and isolation structure according to claim 1, characterized in that: The height of each of the steel plates (2) is the same as the height of the groove (1).

4. The multi-arc vibration reduction and isolation structure according to claim 1, characterized in that: A crushed stone cushion layer (7) is provided at the bottom of the groove (1), and the prefabricated reinforced concrete slab (3), the prefabricated elastic material slab (5) and the cast-in-place concrete slab (4) are located above the crushed stone cushion layer (7).

5. The multi-arc vibration reduction and isolation structure according to claim 1, characterized in that: The anchor rod assembly (9) includes an anchor rod (903), and the side walls of the prefabricated reinforced concrete plate (3) and the prefabricated elastic material plate (5) are both provided with anchor rod holes (10), the anchor rod (903) passes through the anchor rod hole (10), and the diameter of the anchor rod hole (10) needs to be larger than the diameter of the anchor rod (903).

6. The multi-arc vibration reduction and isolation structure according to claim 5, characterized in that: The anchor rod assembly (9) further comprises a washer (902) and a nut (901); one end of the anchor rod (903) extends to the outside of the precast reinforced concrete slab (3), and the other end is embedded in the interior of the cast-in-place concrete slab (4); and the nut (901) and the washer (902) are fixedly connected to the end of the anchor rod (903) extending to the outside of the precast reinforced concrete slab (3).

7. The multi-arc vibration reduction and isolation structure according to claim 1, characterized in that: The bottom of the water barrier (6) is provided with a plurality of tenons (801), and the tops of the prefabricated reinforced concrete slab (3) and the cast-in-place concrete slab (4) are both provided with tenons (802), and each tenon (801) can be inserted into a tenon groove (802).

8. The multi-arc vibration reduction and isolation structure according to claim 7, characterized in that: The bottom end of the tenon (801) is an isosceles trapezoid, the tenon groove (802) is a metal tenon groove (802), and the top end of the tenon groove (802) is matched with the bottom end of the tenon (801).

9. The multi-arc vibration reduction and isolation structure according to claim 1, characterized in that: The width of the water blocking plate (6) is greater than the width of the groove (1), and the upper surface of the water blocking plate (6) is flush with the upper surface of the groove (1).

10. A construction method for a multi-arc vibration reduction and isolation structure, characterized in that: The steps include: S1: Dig a trench on the original soil between the vibration source and the building; S2: Use static pressure construction on one side of the trench to drive the steel plate into the bottom of the trench; S3: Level the bottom and four walls of the trench, lay a crushed stone cushion at the bottom of the trench, and then vibrate and compact it; S4: inserting the anchor rod into the anchor rod holes of the precast reinforced concrete slab and the precast elastic material slab, one end of the anchor rod protrudes out of the precast reinforced concrete slab and is fixed with a nut and a gasket, and the other end of the anchor rod protrudes out of the precast elastic material slab, and then placing the precast reinforced concrete slab and the precast elastic material slab into the groove and arranging them close to the steel plate; S5: A template is supported on one side of the prefabricated elastic material plate, and prestress is applied to one end of the anchor rod extending out of the prefabricated elastic material plate and fixed on the template, and then concrete is poured in the template to form a cast-in-place concrete slab. At the same time, the anchor rod hole is poured to connect and fix the prefabricated reinforced concrete slab and the prefabricated elastic material slab with the cast-in-place concrete slab. The template is removed after the cast-in-place concrete slab reaches the designed strength; S6: Set up a formwork above the trench for sealing, then pour waterproof mortar at the bottom of the trench, and finally install the baffle, connect the tenon at the bottom of the baffle with the mortise and tenon at the top of the precast reinforced concrete slab and the cast-in-place concrete slab, and finally form the road surface with the baffle to complete the construction of the vibration reduction and isolation structure.

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