CN116145737A - Construction method of elastic vibration reduction system of building foundation and elastic vibration reduction system thereof - Google Patents

Construction method of elastic vibration reduction system of building foundation and elastic vibration reduction system thereof Download PDF

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CN116145737A
CN116145737A CN202211288417.3A CN202211288417A CN116145737A CN 116145737 A CN116145737 A CN 116145737A CN 202211288417 A CN202211288417 A CN 202211288417A CN 116145737 A CN116145737 A CN 116145737A
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elastic
damping
layer
vibration
building foundation
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吴丹
宋瑞祥
邬玉斌
吴琼
张婧
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Institute of Urban Safety and Environmental Science of Beijing Academy of Science and Technology
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Institute of Urban Safety and Environmental Science of Beijing Academy of Science and Technology
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
    • E02D31/08—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against transmission of vibrations or movements in the foundation soil
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/18—Making embankments, e.g. dikes, dams
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/16—Arrangement or construction of joints in foundation structures
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
    • E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
    • E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
    • E02D31/025—Draining membranes, sheets or fabric specially adapted therefor, e.g. with dimples
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92—Protection against other undesired influences or dangers
    • E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
    • E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
    • E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
    • E04H9/0215—Bearing, supporting or connecting constructions specially adapted for such buildings involving active or passive dynamic mass damping systems
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
    • E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
    • E04H9/0237—Structural braces with damping devices

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  • Architecture (AREA)
  • Environmental & Geological Engineering (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
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Abstract

The invention discloses a construction method of a building foundation elastic vibration reduction system and the obtained building foundation elastic vibration reduction system. The PE film is added to the side vibration reduction structure of the building foundation, so that leakage of fluid backfill media can be well prevented. The backfill with the fluid backfill can meet construction requirements, and has the advantages of short construction period and cost saving. The key point of the vibration isolation of the invention is to completely isolate and wrap the outstanding place, and the elastic vibration damping pad is used to completely isolate the soil body from the building structure, and the vibration isolation can be matched with the existing construction procedures such as waterproof engineering, can be implemented under conditions, and can achieve the due effect.

Description

Construction method of elastic vibration reduction system of building foundation and elastic vibration reduction system thereof
Technical Field
The invention belongs to the technical field of buildings, and particularly relates to a construction method of a building foundation elastic vibration reduction system and the building foundation elastic vibration reduction system obtained by the construction method.
Background
Along with the continuous promotion of the urban process in China, the rail transit station, the upper cover of the vehicle section and the property development along the line are rapid. Although the rail transit brings convenience to daily travel of people, the problems of vibration and noise pollution generated by the rail transit are more and more emphasized, and the pollution of underground lines to buildings is mainly caused by vibration and secondary structural noise. Statistics show that vibration caused by rail traffic in some areas is one of the most sensitive environmental vibration sources for the public, and it is necessary to adopt vibration treatment measures for sensitive buildings in high vibration areas to create a peaceful and comfortable living environment. The research on vibration and noise reduction measures for rail transit also becomes a hot problem of the current research.
When the vibration reduction of the track vibration source and the vibration isolation of the transmission way cannot meet the requirements, the self-protection means of the building can be adopted, wherein the elastic pad paving measure of the building foundation is a vibration isolation measure with economical cost, simple and convenient construction, wide application range and obvious effect.
In recent years, due to shortage of red lines, narrow fertilizer grooves, no backfill can be constructed as required, and many projects select backfill materials with high fluidity such as fluid cured soil, concrete or foaming concrete, which are easy to leak and possibly form hard connection.
Therefore, how to develop a construction method of a building foundation elastic vibration reduction system and a building foundation elastic vibration reduction system obtained by the construction method solve the above technical problems are technical problems needed to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the invention provides a construction method of a building foundation elastic vibration reduction system and the obtained building foundation elastic vibration reduction system.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a vibration isolation construction method of a building foundation comprises the construction of a side vibration damping structure of the building foundation and the construction of a bottom vibration damping structure of the building foundation;
the construction method of the side vibration reduction structure of the building foundation comprises the following steps:
(1) Cleaning a base layer, namely cleaning a surface layer formed by a reinforced concrete outer wall and a side wall waterproof layer of a building on site, and ensuring that the surface layer is smooth and free of sharp protrusions and free of accumulated water;
(2) Regional paying-off, namely carrying out regional construction division on the working surface according to the requirements of construction drawings and paying-off;
(3) Preparing a main material and an auxiliary material before paving the materials;
(4) The side wall elastic damping pad is adhered by glue, an adhesive is coated on the side wall elastic damping pad and the side wall waterproof layer, the side wall elastic damping pad is adhered in the area divided by the working face, and the side wall elastic damping pad is tightly flapped;
(5) Special node treatment, local treatment of a protruding pipeline, laying a protruding pipeline on the surface of a side wall elastic damping pad, cutting an opening with proper size at the position of the protruding pipeline, sleeving the opening into the root of the protruding pipeline, tightly connecting the opening with the root of the pipeline, tightly attaching the 500mm high side wall elastic damping pad around the pipeline above the root of the pipeline, and tightly winding the pipeline by using a waterproof adhesive tape;
(6) The waterproof cloth-based adhesive tape is stuck, the elastic damping pad of the side wall is paved flatly, the joints of the cushion blocks are sealed by the adhesive tape, the short circuit formed by the penetration of mortar is avoided, the surface of the elastic damping pad of the side wall is ensured to be clean and free from dust when the adhesive tape is stuck, and the failure of the adhesive tape is avoided;
(7) Sticking a PE film I on the elastic vibration-damping pad of the side wall, and sticking a polyphenyl board on the outer side of the PE film I by using mortar points;
the construction method of the vibration reduction structure of the bottom surface of the building foundation comprises the following steps:
1) Cleaning a base layer, namely cleaning a surface layer formed by foundation soil, a cushion layer, a foundation waterproof layer and a waterproof protective layer on site, ensuring that the surface layer is smooth and free of sharp protrusions and accumulated water, and the flatness is less than 5mm;
2) Regional paying-off, namely carrying out regional construction division on the working surface according to the requirements of construction drawings and paying-off;
3) Preparing a main material and an auxiliary material before paving the materials;
4) Laying the bottom elastic vibration-damping pads in a hollow mode, laying the bottom elastic vibration-damping pads on the surface of the waterproof protective layer in a hollow mode, and paving the bottom elastic vibration-damping pads flatly, wherein butt joint is achieved between every two bottom elastic vibration-damping pads, and gaps among the elastic vibration-damping pads are smaller than 5mm;
5) Special node treatment, local treatment of a protruding pipeline, laying a protruding pipeline on the bottom elastic damping pad, cutting an opening with proper size at the position of the protruding pipeline, sleeving the opening into the root of the protruding pipeline, tightly connecting the opening with the root of the pipeline, tightly attaching the 500mm high-bottom elastic damping pad around the pipeline above the root of the pipeline, and tightly winding the pipeline by using a waterproof adhesive tape;
paving a large-angle slope bottom elastic damping pad, wherein the slope is larger than 45 degrees, brushing an adhesive on the bottom elastic damping pad and a waterproof protective layer, and pasting the bottom elastic damping pad in a region divided by a working surface and tightly beating;
6) The waterproof cloth-based adhesive tape is stuck, the elastic damping pad at the bottom is paved flatly, the joints of the cushion blocks are sealed by the adhesive tape, the short circuit formed by the penetration of mortar is avoided, the surface of the elastic damping pad at the bottom is ensured to be clean and free from dust when the adhesive tape is stuck, and the failure of the adhesive tape is avoided;
7) And (3) paving a PE film II, bonding the PE film II on the bottom elastic vibration damping pad in a point mode, overlapping each PE film II, wherein the overlapping length is not less than 20cm, bonding the PE film II on the surface of the bottom elastic vibration damping pad in a point mode through glue, paving the PE film II flatly, and paving an elastic vibration damping pad protection layer and a building bottom plate on the PE film II.
Further, the method also comprises the step of cleaning slag soil and water at the junction of the reinforced concrete outer wall of the building and the cushion layer in the vibration damping structure of the bottom surface of the building foundation.
The technical effect of adopting the further technical scheme is as follows: the bottommost part of the side vibration reduction structure of the building foundation is often in direct contact with a cushion layer in the vibration reduction structure of the bottom surface of the building foundation, and as slag soil or maintenance water is accumulated in the engineering construction of the building body above, the construction cannot be connected with the vibration reduction structure of the bottom surface of the building foundation, and therefore, the slag soil and the water need to be cleaned at first.
Further, the method also comprises the step of filling foaming glue at the junction of the bottommost part of the side damping structure of the building foundation and the damping structure of the bottom surface of the building foundation.
The technical effect of adopting the further technical scheme is as follows: slag and water at the junction of the bottommost part of the side vibration reduction structure of the building foundation and a cushion layer in the vibration reduction structure of the bottom surface of the building foundation are not cleaned up, or are uneven or moist, so that the vibration reduction cushion cannot be tightly closed by a thread joint, and foaming glue needs to be filled in the gap of the side cushion.
Further, the regional paying-off in the step (2) uses a level meter.
The technical effect of adopting the further technical scheme is as follows: the phenomenon of uneven height of the elastic damping pad of the side wall is avoided, and larger installation errors are avoided.
And (3) connecting the side wall elastic vibration-damping pad at the external corner and the internal corner in a lap joint mode in the step (4).
Further, in the above step (6) and step 6), the tape was a 5cm wide waterproof tape.
Furthermore, the construction method of the side vibration reduction structure of the building foundation further comprises backfilling work, the steps (1) - (7) are performed in a layered mode, and the backfilling work is matched, and each construction is performed for 3 meters.
The technical effect of adopting the further technical scheme is as follows: because of the narrow fertilizer groove, construction is difficult, and layered construction is needed for the steps (1) - (7) and backfilling work.
The invention also provides an elastic vibration damping system for the building foundation, which comprises a side vibration damping structure for the building foundation and a bottom vibration damping structure for the building foundation, wherein the side vibration damping structure for the building foundation comprises a reinforced concrete outer wall, a side wall waterproof layer, a side wall elastic vibration damping cushion layer, a PE film I, a polystyrene board and a backfill layer which are sequentially arranged from inside to outside;
the vibration damping structure for the bottom surface of the building foundation comprises foundation soil, a cushion layer, a foundation waterproof layer, a waterproof protection layer, a bottom elastic vibration damping cushion layer, a PE film II, an elastic vibration damping cushion protection layer and a building bottom plate which are sequentially arranged from bottom to top.
Further, the backfill layer is made of fluid state solidified concrete or foaming concrete.
Furthermore, the elastic damping cushion layers of the side wall and the elastic damping cushion layers of the bottom are made of polyurethane closed-cell materials, the static load range is 10-6000 kN/square meter, and the compression set is less than 5%.
The technical effect of adopting the further technical scheme is as follows: the polyurethane closed-cell material has good vibration damping performance, and can not absorb water to increase rigidity and reduce vibration damping effect when groundwater exists.
Further, the cushion layer is a concrete C15 cushion layer, the waterproof protection layer is C20 fine stone concrete, the elastic vibration reduction cushion protection layer is C20 fine stone concrete, and the building bottom plate is reinforced concrete.
Further, the thickness of the reinforced concrete outer wall of the building is 200-500mm, the thickness of the side wall waterproof layer is 1-8mm, the thickness of the side wall elastic damping cushion layer is 25-50mm, the thickness of the PE film I is 0.08-0.15mm, the thickness of the polystyrene board is 50mm, and the thickness of the backfill layer is 0.5-3.0m.
Further, the thickness of the cushion layer is 100mm, the thickness of the basic waterproof layer is 1-8mm, the thickness of the waterproof protective layer is 50mm, the thickness of the elastic damping cushion layer at the bottom is 25-50mm, the thickness of the PE film II is more than 0.08mm, the thickness of the elastic damping cushion protective layer is 50mm, and the thickness of the building bottom plate is 500-2000mm.
The technical effect of adopting the further technical scheme is as follows: the thickness of the PE film II is more than 0.08mm, and the bottom elastic damping cushion layer is secondarily protected to prevent concrete from leaking to form an acoustic bridge. The thickness of the elastic vibration damping pad protective layer is 50mm, so that the bottom elastic vibration damping pad is prevented from being pierced and damaged by steel bar operation, and welding ignition is prevented. Meanwhile, the load is ensured to be stable and uniform under the condition of the reinforcing steel bar cushion block.
The invention has the beneficial effects that: the PE film is added in the elastic vibration damping system for the building foundation, and in recent years, due to the shortage of red lines, narrow fertilizer grooves and incapability of backfilling soil according to requirements, a plurality of projects select backfilling materials with high fluidity such as fluid solidified soil or concrete or foaming concrete, so that the backfilling materials are easy to leak and hard connection is possibly formed, and therefore, a layer of PE film is added, and leakage of fluid backfilling media can be well prevented. The backfill with the fluid backfill can meet construction requirements, and has the advantages of short construction period and cost saving.
The key point of the vibration isolation of the invention is to completely isolate and wrap the outstanding place, and the elastic vibration damping pad is used to completely isolate the soil body from the building structure, and the vibration isolation can be matched with the existing construction procedures such as waterproof engineering, can be implemented under conditions, and can achieve the due effect.
Drawings
FIG. 1 is a construction flow chart of the elastic vibration damping system of the building foundation of the present invention;
FIG. 2 is a schematic structural view of the elastic vibration damping system for building foundation of the present invention, wherein the first elastic vibration damping cushion layer is a 1-building reinforced concrete outer wall, the second elastic vibration damping cushion layer is a 2-side wall waterproof layer, the third elastic vibration damping cushion layer is a 3-side wall waterproof layer, the first elastic vibration damping cushion layer is a 4-PE film, the second elastic vibration damping cushion layer is a 5-polystyrene board, the third elastic vibration damping cushion layer is a 6-backfill layer, the third elastic vibration damping cushion layer is a 7-foundation soil layer, the fourth elastic vibration damping cushion layer is a 8-cushion layer, the third elastic vibration damping cushion layer is a 9-foundation waterproof layer, the third waterproof layer is a 10-waterproof protection layer, the fourth elastic vibration damping cushion layer is a 11-bottom, the second elastic vibration damping cushion layer is a 12-PE film, and the third elastic vibration damping cushion layer is a 14-building bottom plate;
FIG. 3 (a) is a schematic view of a side wall elastic damping pad connected in a lap joint manner at an external corner, and (b) is a schematic view of a side wall elastic damping pad connected in a lap joint manner at an internal corner;
fig. 4 vibration transfer rate curve.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1, the construction method of the side vibration damping structure of the building foundation comprises the following steps:
(1) Cleaning a base layer, namely cleaning a surface layer formed by a reinforced concrete outer wall and a side wall waterproof layer of a building on site, ensuring that the surface layer is smooth and free of sharp protrusions and accumulated water, and the flatness is less than 5mm;
(2) Regional paying-off, namely carrying out regional construction division on a working surface according to the requirements of construction drawings and paying-off by using a level gauge;
(3) Preparing a main material and an auxiliary material before paving the materials;
(4) The side wall elastic damping pad is adhered by glue, an adhesive is coated on the side wall elastic damping pad and the side wall waterproof layer, the side wall elastic damping pad is adhered in the area divided by the working face and is tightly flapped, and as shown in fig. 3, the side wall elastic damping pad is connected at the external corner and the internal corner in a lap joint mode;
(5) Special node treatment, local treatment of a protruding pipeline, laying a protruding pipeline on the surface of a side wall elastic damping pad, cutting an opening with proper size at the position of the protruding pipeline, sleeving the opening into the root of the protruding pipeline, tightly connecting the opening with the root of the pipeline, tightly attaching the 500mm high side wall elastic damping pad around the pipeline above the root of the pipeline, and tightly winding the pipeline by using a waterproof adhesive tape;
(6) The waterproof cloth-based adhesive tape is stuck, the elastic damping pad of the side wall is paved flatly, the joints of the cushion blocks are sealed by adopting waterproof adhesive tapes with the width of 5cm, the short circuit formed by the penetration of mortar is avoided, the surface of the elastic damping pad of the side wall is ensured to be clean and free from dust when the adhesive tape is stuck, and the adhesive tape is prevented from losing efficacy;
(7) And (3) sticking a PE film I on the elastic vibration damping pad of the side wall, sticking a polyphenyl board on the outer side of the PE film I by using mortar points, performing layered construction in the steps (1) - (7), and simultaneously matching with backfilling work, wherein each construction is 3 meters.
As shown in fig. 1, the construction method of the vibration damping structure of the bottom surface of the building foundation comprises the following steps:
1) Cleaning a base layer, namely cleaning a surface layer formed by foundation soil, a cushion layer, a foundation waterproof layer and a waterproof protective layer on site, so as to ensure that the surface layer is smooth and free of sharp protrusions and water accumulation;
2) Regional paying-off, namely carrying out regional construction division on the working surface according to the requirements of construction drawings and paying-off;
3) Preparing a main material and an auxiliary material before paving the materials;
4) Laying the bottom elastic vibration-damping pads in a hollow mode, laying the bottom elastic vibration-damping pads on the surface of the waterproof protective layer in a hollow mode, and paving the bottom elastic vibration-damping pads flatly, wherein butt joint is achieved between every two bottom elastic vibration-damping pads, and gaps among the elastic vibration-damping pads are smaller than 5mm;
5) Special node treatment, local treatment of a protruding pipeline, laying a protruding pipeline on the bottom elastic damping pad, cutting an opening with proper size at the position of the protruding pipeline, sleeving the opening into the root of the protruding pipeline, tightly connecting the opening with the root of the pipeline, tightly attaching the 500mm high-bottom elastic damping pad around the pipeline above the root of the pipeline, and tightly winding the pipeline by using a waterproof adhesive tape;
paving a large-angle slope bottom elastic damping pad, wherein the slope is larger than 45 degrees, brushing an adhesive on the bottom elastic damping pad and a waterproof protective layer, and pasting the bottom elastic damping pad in a region divided by a working surface and tightly beating;
6) The waterproof cloth-based adhesive tape is stuck, the elastic damping pad at the bottom is paved flatly, the joints of the cushion blocks are sealed by adopting waterproof adhesive tapes with the width of 5cm, the short circuit formed by the penetration of mortar is avoided, the surface of the elastic damping pad at the bottom is ensured to be clean and free from dust when the adhesive tape is stuck, and the adhesive tape is prevented from losing efficacy;
7) And (3) paving a PE film II on the bottom elastic damping pad by adopting an empty paving or point bonding mode, wherein the overlapping length of each PE film II is not less than 20cm, the PE film II is fixedly adhered to the surface of the bottom elastic damping pad by glue points, the PE film II is paved flatly, an elastic damping pad protection layer and a building bottom plate are paved on the PE film II, dregs and water at the junction of a building reinforced concrete outer wall of a building foundation side damping structure and a cushion layer in the building foundation bottom damping structure are cleaned, if the dregs and water are not cleaned, the dregs are uneven or moist, the side wall elastic damping pad and the bottom elastic damping pad cannot be tightly closed by silk, and foaming glue is filled at the junction of the bottommost of the building foundation side damping structure and the building foundation bottom damping structure. Before the side vibration reduction structure of the building foundation is made, the cushion layer is easy to accumulate dregs, building rubbish or poured concrete, even if the cushion layer is cleaned, potholes are left to be protruding, the side vibration reduction structure of the building foundation cannot be tightly attached to water resistance, short circuit can be possibly caused, and therefore foaming glue is used for filling.
Principle of control design
The existing subway vibration control design of the elastic vibration-damping pad of the building foundation is mainly based on the vibration isolation principle of a single-degree-of-freedom system. The vibration isolation effect of the elastic vibration damper is generally expressed by the vibration transmissibility, and the calculation formula is as follows:
Figure SMS_1
wherein: η is the transmissibility;
Figure SMS_2
is the damping ratio; f is the source strong excitation frequency; f (f) 0 Is the natural frequency of the vibration isolation system. FIG. 4 shows the ratio of vibration transmissivity to frequency (f/f 0 ) A graph of the functional relationship between the two, from which it can be seen that the frequency ratio (f/f 0 ) At 1, the vibration transmissivity is maximum, the system resonates, and the frequency ratio (f/f 0 ) Is greater than->
Figure SMS_3
When the transmissibility is smaller than 1, the system enters the vibration isolation area, and the larger the frequency ratio is, the smaller the vibration transmissibility is, namely the better the vibration isolation effect is; as can be seen from FIG. 4, when the frequency ratio (f/f 0 ) Less than
Figure SMS_4
The larger the damping ratio, the smaller the vibration isolation transmissibility, and when the frequency ratio (f/f 0 ) Is greater than->
Figure SMS_5
When the damping ratio is smaller, the vibration transmissibility is smaller, namely in a vibration isolation area, the vibration isolation effect is inversely proportional to the damping ratio, and in a resonance area, the vibration isolation effect is directly proportional to the damping ratio.
As can be seen from the above-mentioned vibration transmissibility calculation formula, under the condition of a certain external excitation load, a better vibration isolation effect can be obtained by reducing the natural frequency of the system, and for a building-elastic vibration-damping pad system, the natural frequency f of the system 0 The calculation formula is as follows:
Figure SMS_6
wherein: m is the building quality, kg; k is the stiffness of the elastic vibration damping pad; as can be seen from the formula (2), the building foundation elastic vibration-damping pad measures mainly control vibration by designing the vertical natural frequency of the system, the vertical natural frequency of the system is mainly determined by the upper building quality and the vertical rigidity of the elastic vibration-damping pad, and under the condition that the upper building quality is fixed, the vibration-damping effect is mainly designed by adjusting the rigidity of the elastic vibration-damping pad, and the rigidity of the elastic vibration-damping pad is mainly determined by the thickness of the cushion layer and the elastic modulus.
As shown in fig. 2, the elastic vibration damping system for the building foundation comprises a side vibration damping structure for the building foundation and a bottom vibration damping structure for the building foundation, wherein the side vibration damping structure for the building foundation comprises a reinforced concrete outer wall 1, a side wall waterproof layer 2, a side wall elastic vibration damping cushion layer 3, a PE film I4, a polystyrene board 5 and a backfill layer 6 which are sequentially arranged from inside to outside;
the vibration damping structure of the building foundation bottom surface comprises foundation soil 7, a cushion layer 8, a foundation waterproof layer 9, a waterproof protection layer 10, a bottom elastic vibration damping cushion layer 11, a PE film II 12, an elastic vibration damping cushion protection layer 13 and a building bottom plate 14 which are sequentially arranged from bottom to top.
In one embodiment, the material of the backfill layer 6 is a fluid cured or concrete or a foamed concrete.
In one embodiment, the side wall elastic damping cushion 3 and the bottom elastic damping cushion 11 are both made of polyurethane closed-cell materials, the static load range is 10-6000 kN/square meter, and the compression set is less than 5%.
In one embodiment, the cushion 8 is a concrete C15 cushion, the waterproof protective layer 10 is C20 fine stone concrete, the elastic vibration damping cushion protective layer 13 is C20 fine stone concrete, and the building floor 14 is reinforced concrete.
In one embodiment, the thickness of the reinforced concrete outer wall 1 of the building is 200-500mm, the thickness of the side wall waterproof layer 2 is 1-8mm, the thickness of the side wall elastic damping cushion layer 3 is 25-50mm, the thickness of the PE film I4 is 0.08-0.15mm, the thickness of the polystyrene board 5 is 50mm, and the thickness of the backfill layer 6 is 0.5-3.0m.
In one embodiment, the thickness of the cushion layer 8 is 100mm, the thickness of the base waterproof layer 9 is 1-8mm, the thickness of the waterproof protective layer 10 is 50mm, the thickness of the bottom elastic vibration damping cushion layer 11 is 25-50mm, the thickness of the PE film II 12 is more than 0.08mm, the thickness of the elastic vibration damping cushion protective layer 13 is 50mm, and the thickness of the building bottom plate 14 is 500-2000mm.
Compared with the traditional construction method of the elastic vibration damping system of the building foundation, the construction method of the elastic vibration damping system of the building foundation has the advantages that 28 gray soil is conditionally changed into backfill fluid solidified soil from original design backfill, so that the economic cost is saved by about 200 ten thousand yuan, and the construction period cost is saved by about 20 days. Meanwhile, the vibration reduction effect is good, the expected design effect is achieved, and the vibration and secondary structural sound can meet the national standard.
The description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. The construction method of the elastic vibration damping system of the building foundation is characterized by comprising the construction of a side vibration damping structure of the building foundation and the construction of a bottom vibration damping structure of the building foundation;
the construction method of the side vibration reduction structure of the building foundation comprises the following steps:
(1) Cleaning a base layer, namely cleaning a surface layer formed by a reinforced concrete outer wall and a side wall waterproof layer of a building on site, and ensuring that the surface layer is smooth and free of sharp protrusions and free of accumulated water;
(2) Regional paying-off, namely carrying out regional construction division on the working surface according to the requirements of construction drawings and paying-off;
(3) Preparing a main material and an auxiliary material before paving the materials;
(4) The side wall elastic damping pad is adhered by glue, an adhesive is coated on the side wall elastic damping pad and the side wall waterproof layer, the side wall elastic damping pad is adhered in the area divided by the working face, and the side wall elastic damping pad is tightly flapped;
(5) Special node treatment, local treatment of a protruding pipeline, laying a protruding pipeline on the surface of a side wall elastic damping pad, cutting an opening with proper size at the position of the protruding pipeline, sleeving the opening into the root of the protruding pipeline, tightly connecting the opening with the root of the pipeline, tightly attaching the 500mm high side wall elastic damping pad around the pipeline above the root of the pipeline, and tightly winding the pipeline by using a waterproof adhesive tape;
(6) The waterproof cloth-based adhesive tape is stuck, the elastic damping pad of the side wall is paved flatly, the joints of the cushion blocks are sealed by the adhesive tape, the short circuit formed by the penetration of mortar is avoided, the surface of the elastic damping pad of the side wall is ensured to be clean and free from dust when the adhesive tape is stuck, and the failure of the adhesive tape is avoided;
(7) Sticking a PE film I on the elastic vibration-damping pad of the side wall, and sticking a polyphenyl board on the outer side of the PE film I by using mortar points;
the construction method of the vibration reduction structure of the bottom surface of the building foundation comprises the following steps:
1) Cleaning a base layer, namely cleaning a surface layer formed by foundation soil, a cushion layer, a foundation waterproof layer and a waterproof protective layer on site, ensuring that the surface layer is smooth and free of sharp protrusions and accumulated water, and the flatness is less than 5mm;
2) Regional paying-off, namely carrying out regional construction division on the working surface according to the requirements of construction drawings and paying-off;
3) Preparing a main material and an auxiliary material before paving the materials;
4) Laying the bottom elastic vibration-damping pads in a hollow mode, laying the bottom elastic vibration-damping pads on the surface of the waterproof protective layer in a hollow mode, and paving the bottom elastic vibration-damping pads flatly, wherein butt joint is achieved between every two bottom elastic vibration-damping pads, and gaps among the elastic vibration-damping pads are smaller than 5mm;
5) Special node treatment, local treatment of a protruding pipeline, laying a protruding pipeline on the bottom elastic damping pad, cutting an opening with proper size at the position of the protruding pipeline, sleeving the opening into the root of the protruding pipeline, tightly connecting the opening with the root of the pipeline, tightly attaching the 500mm high-bottom elastic damping pad around the pipeline above the root of the pipeline, and tightly winding the pipeline by using a waterproof adhesive tape;
paving a large-angle slope bottom elastic damping pad, wherein the slope is larger than 45 degrees, brushing an adhesive on the bottom elastic damping pad and a waterproof protective layer, and pasting the bottom elastic damping pad in a region divided by a working surface and tightly beating;
6) The waterproof cloth-based adhesive tape is stuck, the elastic damping pad at the bottom is paved flatly, the joints of the cushion blocks are sealed by the adhesive tape, the short circuit formed by the penetration of mortar is avoided, the surface of the elastic damping pad at the bottom is ensured to be clean and free from dust when the adhesive tape is stuck, and the failure of the adhesive tape is avoided;
7) And (3) paving a PE film II, paving a PE film II on the elastic damping pad at the bottom, overlapping each PE film II, wherein the overlapping length is not less than 20cm, using glue to fix the PE film II on the surface of the elastic damping pad at the bottom, paving the PE film II flatly, and paving an elastic damping pad protection layer and a building bottom plate on the PE film II.
2. The method of claim 1, further comprising cleaning slag and water at the interface between the reinforced concrete exterior wall of the building and the cushion layer in the vibration damping structure of the bottom surface of the building foundation.
3. The method of claim 1, further comprising filling the interface between the bottommost portion of the side damping structure of the building foundation and the bottom damping structure of the building foundation with a foam.
4. The method of claim 1, wherein the step (4) is performed by connecting the side wall elastic vibration-damping pad at the external corner and the internal corner in a lap joint manner.
5. The method of claim 1, wherein in the step (6) and the step 6), the adhesive tape is a waterproof adhesive tape with a width of 5 cm.
6. A building foundation elastic vibration damping system obtained by a construction method of the building foundation elastic vibration damping system according to any one of claims 1-5, which is characterized by comprising a building foundation side vibration damping structure and a building foundation bottom surface vibration damping structure, wherein the building foundation side vibration damping structure comprises a building reinforced concrete outer wall, a side wall waterproof layer, a side wall elastic vibration damping cushion layer, a PE film I, a polystyrene board and a backfill layer which are sequentially arranged from inside to outside;
the vibration reduction structure of the building foundation bottom surface comprises foundation soil, a cushion layer, a foundation waterproof layer, a waterproof protection layer, a bottom elastic vibration reduction cushion layer, a PE film II, an elastic vibration reduction cushion protection layer and a building bottom plate which are sequentially arranged from bottom to top.
7. The elastic vibration-damping system of building foundation according to claim 6, wherein the material of the backfill layer is fluid-state solidified concrete or foamed concrete.
8. The elastic vibration damping system for building foundation according to claim 6, wherein the elastic vibration damping cushion layer of the side wall and the elastic vibration damping cushion layer of the bottom are made of polyurethane closed-cell materials, the static load range is 10-6000 kN/square meter, and the compression set is less than 5%.
9. The elastic vibration-damping system for building foundation according to claim 6, wherein the cushion layer is a concrete C15 cushion layer, the waterproof protective layer is C20 fine stone concrete, the elastic vibration-damping cushion protective layer is C20 fine stone concrete, and the building bottom plate is reinforced concrete.
CN202211288417.3A 2022-10-20 2022-10-20 Construction method of elastic vibration reduction system of building foundation and elastic vibration reduction system thereof Pending CN116145737A (en)

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Publication number Priority date Publication date Assignee Title
US20030163971A1 (en) * 2002-02-26 2003-09-04 Jiann-Min Chen Method of applying a self-adhesive waterproof membrane to an external wall and base slab of an underground construction
CN103452197A (en) * 2013-03-07 2013-12-18 中国建筑第四工程局有限公司 Sound-insulating floating floor surface structure and construction method thereof
CN104196059A (en) * 2014-09-22 2014-12-10 北京宝曼科技有限公司 Building foundation vibration isolation system
CN109930631A (en) * 2019-04-10 2019-06-25 北京市劳动保护科学研究所 Building foundation vibration insulation structure and its construction method
CN110242089A (en) * 2019-05-31 2019-09-17 杨维国 A kind of isolation mounting and vibration isolating method suitable for vertical motion caused by rail traffic
CN112922041A (en) * 2021-02-02 2021-06-08 北京城建北方集团有限公司 Vibration reduction construction process for underground track traffic approaching building

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030163971A1 (en) * 2002-02-26 2003-09-04 Jiann-Min Chen Method of applying a self-adhesive waterproof membrane to an external wall and base slab of an underground construction
CN103452197A (en) * 2013-03-07 2013-12-18 中国建筑第四工程局有限公司 Sound-insulating floating floor surface structure and construction method thereof
CN104196059A (en) * 2014-09-22 2014-12-10 北京宝曼科技有限公司 Building foundation vibration isolation system
CN109930631A (en) * 2019-04-10 2019-06-25 北京市劳动保护科学研究所 Building foundation vibration insulation structure and its construction method
CN110242089A (en) * 2019-05-31 2019-09-17 杨维国 A kind of isolation mounting and vibration isolating method suitable for vertical motion caused by rail traffic
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