CN114525819A - Vibration isolation structure of tower crane foundation and construction method thereof - Google Patents
Vibration isolation structure of tower crane foundation and construction method thereof Download PDFInfo
- Publication number
- CN114525819A CN114525819A CN202210171264.8A CN202210171264A CN114525819A CN 114525819 A CN114525819 A CN 114525819A CN 202210171264 A CN202210171264 A CN 202210171264A CN 114525819 A CN114525819 A CN 114525819A
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- vibration isolation
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/44—Foundations for machines, engines or ordnance
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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
- E02D31/02—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
Abstract
The invention relates to the technical field of building vibration isolation, and discloses a vibration isolation structure of a tower crane foundation and a construction method thereof, wherein the vibration isolation structure comprises the following steps: a top surface of the foundation pit, a bottom surface of the foundation pit, an inclined side wall arranged between the two, and a raft plate foundation arranged above the top surface of the foundation pit, foundation ditch bottom surface and slope lateral wall enclose into the form of falling round platform, slope lateral wall and foundation ditch bottom surface are provided with and look for the flat portion, waterproof portion and vibration isolation portion, the portion of making level is including setting up in the foundation soil layer of foundation ditch bottom surface and setting up in the concrete layer of foundation soil layer and slope lateral wall up end, waterproof portion is including setting up in the waterproof layer of concrete layer up end and setting up the water proof layer on the waterproof layer, vibration isolation portion is including setting up in the vibration isolation bed course of water proof layer up end and setting up the vibration isolation pad protective layer on the vibration isolation bed course, be located and be provided with the tower crane basis on the up end of the vibration isolation pad protective layer of foundation ditch bottom surface, the pre-buried festival of tower crane has been pour in the tower crane basis, residual space in the foundation ditch is the filling layer, the filling layer wraps up the tower crane basis.
Description
Technical Field
The invention relates to the technical field of vibration isolation of buildings, in particular to a vibration isolation structure of a tower crane foundation and a construction method thereof.
Background
The pollution of subway vibration severely restricts the development of urban rail transit and restricts the development of land at two sides of the subway. The land resources of large cities are increasingly tense, the existing houses can not meet the increasing population living requirements, and projects for planning and building new sensitive buildings on two sides of a subway main line are increasingly increased.
At present, various vibration reduction measures aiming at subway vibration exist, a building foundation elastic cushion is one of the forms of building vibration control measures, the vertical natural frequency of a building structure system is reduced by paving an elastic material on a building base and a side wall, so that the aim of weakening the subway vibration influence is fulfilled, and the subway vibration damping cushion has an extremely wide engineering application prospect.
The time for the building foundation elasticity control measure to appear in China is relatively late, the research on the application basic theory of the measure is relatively lagged, and the scheme design method, the performance requirement and detection method of the damping material, the construction process and the key node method are not mature enough.
During the building engineering construction, in order to use the tower crane in time to carry out perpendicular transportation, the tower crane is often arranged in the bottom of foundation ditch inside, raft foundation, and the raft foundation needs to be passed to the pre-buried festival of tower crane. In order to prevent the vibration isolator from being damaged by the pre-buried section of the tower crane and ensure the integrity of the vibration isolator, the vibration isolator needs to be arranged at the bottom of the tower crane foundation. In order to prevent the vibration isolation pad from being corroded by underground water, the waterproof layer is arranged at the bottom of the vibration isolation pad to protect the vibration isolation pad.
The applicant finds in long-term research that a vibration isolation structure system and a construction method thereof are researched for the vibration isolation pad arrangement mode at the tower crane foundation, and the vibration isolation effect of the whole building is ensured.
Disclosure of Invention
The application provides a vibration isolation structure of a tower crane foundation and a construction method thereof, and aims to solve the problems that in the existing vibration isolation structure, a tower crane embedded section damages a vibration isolation pad, the vibration isolation pad is easy to be corroded by underground water, the integrity of the vibration isolation pad is poor, and the vibration isolation effect is not obvious.
In order to solve the technical problem, the application provides a vibration isolation structure of a tower crane foundation and a construction method thereof, and the vibration isolation structure comprises the following steps: the foundation pit comprises a foundation pit top surface, a foundation pit bottom surface, an inclined side wall arranged between the foundation pit top surface and the foundation pit bottom surface and a raft plate foundation arranged above the foundation pit top surface, wherein the foundation pit top surface, the foundation pit bottom surface and the inclined side wall are enclosed into an inverted round platform shape, the inclined side wall and the foundation pit bottom surface are provided with a leveling part, a waterproof part and a vibration isolation part, the leveling part comprises a foundation soil layer arranged on the foundation pit bottom surface and a concrete layer arranged on the upper end surfaces of the foundation soil layer and the inclined side wall, the waterproof part comprises a waterproof layer arranged on the upper end surface of the concrete layer and a waterproof protective layer arranged on the waterproof layer, the vibration isolation part comprises a vibration isolation cushion layer arranged on the upper end surface of the waterproof protective layer and a vibration isolation cushion protective layer arranged on the vibration isolation cushion layer, a tower crane foundation is arranged on the upper end surface of the vibration isolation cushion protective layer on the foundation pit bottom surface, a tower crane foundation is poured with a pre-buried section in the tower crane foundation, and the residual space in the foundation pit is a filling layer, the tower crane foundation is wrapped by the filling layer.
In some embodiments of this application, the vibration isolation cushion layer includes a plurality of interconnect's vibration isolator and sets up the stickness plastic area between adjacent vibration isolator gap, is provided with special glue between the up end of adjacent vibration isolation cushion layer, the length of laying of special glue is 50mm for the restriction concrete granule removes to the vibration isolator gap.
In some embodiments of the present application, the internal corners and the external corners of the waterproof protective layer are rhomboid, and the surface of the waterproof protective layer is a smooth plane for limiting the permeation of groundwater to the vibration isolation cushion layer.
In some embodiments of the present application, the sloped sidewalls are sloped at an angle ≦ 45.
In some embodiments of this application, the top surface elevation of tower crane basis is less than the height of foundation ditch top surface.
In some embodiments of this application, the top of the pre-buried festival of tower crane is higher than the top surface elevation of raft foundation.
In some embodiments of the present application, the waterproof layer is polyester child SBS modified asphalt waterproofing membrane, the vibration isolation cushion layer is the polyurethane material, waterproof protective layer and vibration isolation cushion protective layer are plain concrete C20.
In some embodiments of the application, a construction method of a vibration isolation structure of a tower crane foundation comprises the following steps:
A. excavating a foundation pit of a tower crane foundation, controlling the excavation depth within 2m, excavating in layers, measuring the data of the foundation pit every time one layer is finished, controlling the inclination angle of the inclined side wall at 45 degrees, and setting the slope coefficient to be 1: 1;
B. constructing a concrete cushion, namely flattening and compacting the upper surface of a foundation pit soil layer, and then pouring concrete;
C. constructing a waterproof part, namely constructing a water layer and a waterproof protective layer to ensure that the waterproof protective layer is flat and smooth and has clear water chestnuts;
D. constructing a vibration isolation part, namely constructing a vibration isolation cushion layer and a vibration isolation cushion protective layer, and tightly pasting splicing gaps of adjacent vibration isolation cushions by using adhesive tapes; laying a special adhesive on the upper end surfaces of adjacent vibration isolation pads, and constructing a vibration isolation pad protective layer after the special adhesive is solidified;
E. constructing a tower crane foundation, pouring reinforced concrete of the tower crane foundation when the strength of the vibration isolation pad protective layer reaches 1.2MPA, pre-burying tower crane joints, and constructing a raft foundation;
F. and (3) filling layer construction, namely adding a filler into the space below the top surface in the foundation pit, and thus finishing the construction of the vibration isolation structure of the tower crane foundation.
In some embodiments of the present application, in step C, the constructor should perform compaction and calendering after the initial setting and before the final setting of the concrete after the construction of the waterproof protective layer is completed.
Compared with the prior art, the invention has the following characteristics and beneficial effects:
according to the invention, each structural layer is arranged at the bottom of the tower crane foundation, so that the overall vibration isolation effect of a building is obviously improved;
according to the invention, the waterproof layer is arranged at the bottom of the vibration isolation pad, so that the vibration isolation pad is prevented from being eroded by underground water, the durability of the vibration isolation pad is further ensured, and the vibration isolation effect is improved;
according to the invention, the construction of the whole construction form is convenient and simple, most of the construction processes are relatively mature processes and easy to accept, so that the construction efficiency is greatly improved, and the construction period is shortened;
in the invention, all the procedures can be carried out in the foundation pit, and the safety can be ensured.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;
fig. 2 is a schematic view of the structure of the vibration isolation cushion according to the embodiment of the invention.
In the figure, 100, the top surface of the foundation pit; 200. the bottom surface of the foundation pit; 210. a foundation soil layer; 220. a concrete layer; 230. a waterproof layer; 240. a waterproof protective layer; 250. a vibration isolation cushion layer; 251. a vibration isolator; 252. a tacky plastic tape; 253. special glue; 260. a vibration-isolating pad protective layer; 270. a tower crane foundation; 280. pre-burying sections of a tower crane; 290. a filling layer; 300. an inclined side wall; 400. a raft foundation.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
As shown in fig. 1-2, according to some embodiments of the present application, a vibration isolation structure of a tower crane foundation and a construction method thereof includes: the foundation pit top surface 100, the foundation pit bottom surface 200, the inclined side wall 300 arranged between the two and the raft foundation 400 arranged above the foundation pit top surface 100, the foundation pit bottom surface 200 and the inclined side wall 300 enclose into an inverted round table shape, the inclined side wall 300 and the foundation pit bottom surface 200 are provided with a leveling part, a waterproof part and a vibration isolation part, the leveling part comprises a foundation soil layer 210 arranged on the foundation pit bottom surface 200 and a concrete layer 220 arranged on the upper end surfaces of the foundation soil layer 210 and the inclined side wall 300, the waterproof part comprises a waterproof layer 230 arranged on the upper end surface of the concrete layer 220 and a waterproof protective layer 240 arranged on the waterproof layer 230, the vibration isolation part comprises a vibration isolation cushion layer 250 arranged on the upper end surface of the waterproof protective layer 240 and a vibration isolation cushion protective layer 260 arranged on the vibration isolation cushion 250, the tower crane foundation 270 is arranged on the upper end surface of the vibration isolation cushion protective layer 260 on the foundation pit bottom surface 200, and the tower crane foundation 270 is poured with a tower crane embedded joint 280, the remaining space in the foundation pit is a filling layer 290, and the tower crane foundation 270 is wrapped by the filling layer 290.
According to some embodiments of the present application, the vibration isolation pad layer 250 includes a plurality of vibration isolation pads 251 connected to each other and an adhesive plastic tape 252 disposed between the gaps of the adjacent vibration isolation pads 251, a dedicated adhesive 253 is disposed between the upper end surfaces of the adjacent vibration isolation pad layers 250, and the laying length of the dedicated adhesive 253 is 50mm, so as to limit the concrete particles from moving to the gaps of the vibration isolation pads 251.
According to some embodiments of the present application, the inner and outer corners of the waterproof protective layer 240 are rhomboid-shaped, and the surface of the waterproof protective layer 240 is a smooth plane for limiting the penetration of groundwater into the vibration isolation pad layer 250.
According to some embodiments of the present application, the sloped sidewalls 300 are sloped at an angle ≦ 45.
According to some embodiments of the present application, the top surface elevation of tower crane foundation 270 is less than the height of foundation pit top surface 100.
According to some embodiments of this application, the top of tower crane embedded joint 280 is higher than the top surface elevation of raft foundation 400.
According to some embodiments of the present disclosure, the waterproof layer 230 is a polyester-based SBS modified asphalt waterproof coiled material, the vibration isolation pad layer 250 is made of polyurethane, and the waterproof protective layer 240 and the vibration isolation pad protective layer 260 are plain concrete C20.
According to some embodiments of the application, a construction method of a vibration isolation structure of a tower crane foundation comprises the following steps:
A. excavating a foundation pit of the tower crane foundation 270, controlling the excavation depth within 2m, excavating in layers, measuring the data of the foundation pit every time when one layer is finished, controlling the inclination angle of the inclined side wall 300 at 45 degrees, and setting the slope coefficient to be 1: 1;
B. constructing a concrete cushion, namely flattening and compacting the upper surface of a foundation pit soil layer, and then pouring concrete;
C. constructing a waterproof part, namely constructing a water layer and a waterproof protective layer 240 to ensure that the waterproof protective layer 240 is flat and smooth and the water caltrops are clear;
D. constructing a vibration isolation part, namely constructing a vibration isolation cushion layer 250 and a vibration isolation cushion protection layer 260, and tightly adhering splicing gaps of adjacent vibration isolation cushions 251 by using adhesive tapes; laying a special adhesive on the upper end surface of the adjacent vibration isolation pad 251, and constructing a vibration isolation pad protective layer 260 after the special adhesive is solidified;
E. constructing a tower crane foundation 270, pouring reinforced concrete of the tower crane foundation 270 when the strength of the vibration isolation pad protective layer 260 reaches 1.2MPA, pre-burying tower crane joints, and then constructing a raft foundation 400;
F. and (3) constructing a filling layer 290, and adding a filling material into the space below the inner top surface of the foundation pit, so that the construction of the vibration isolation structure of the tower crane foundation 270 is completed.
According to some embodiments of the present disclosure, in step C, the constructor should perform the polishing after the construction of the waterproof protective layer 240 is completed, and then the concrete is initially set and before final setting.
To sum up, the invention relates to the technical field of vibration isolation of buildings, and discloses a vibration isolation structure of a tower crane foundation and a construction method thereof, wherein the vibration isolation structure comprises the following steps: a top surface of the foundation pit, a bottom surface of the foundation pit, an inclined side wall arranged between the two, and a raft plate foundation arranged above the top surface of the foundation pit, foundation ditch bottom surface and slope lateral wall enclose into the form of falling round platform, slope lateral wall and foundation ditch bottom surface are provided with and look for the flat portion, waterproof portion and vibration isolation portion, the portion of making level is including setting up in the foundation soil layer of foundation ditch bottom surface and setting up in the concrete layer of foundation soil layer and slope lateral wall up end, waterproof portion is including setting up in the waterproof layer of concrete layer up end and setting up the water proof layer on the waterproof layer, vibration isolation portion is including setting up in the vibration isolation bed course of water proof layer up end and setting up the vibration isolation pad protective layer on the vibration isolation bed course, be located and be provided with the tower crane basis on the up end of the vibration isolation pad protective layer of foundation ditch bottom surface, the pre-buried festival of tower crane has been pour in the tower crane basis, residual space in the foundation ditch is the filling layer, the filling layer wraps up the tower crane basis.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (9)
1. A vibration isolation structure of a tower crane foundation, comprising: the foundation pit comprises a foundation pit top surface (100), a foundation pit bottom surface (200), an inclined side wall (300) arranged between the foundation pit top surface (100) and the foundation pit bottom surface (200) and a raft plate foundation (400) arranged above the foundation pit top surface (100), and is characterized in that the foundation pit top surface (100), the foundation pit bottom surface (200) and the inclined side wall (300) are enclosed into an inverted round table shape, the inclined side wall (300) and the foundation pit bottom surface (200) are provided with a leveling part, a waterproof part and a vibration isolation part, the leveling part comprises a foundation soil layer (210) arranged on the foundation pit bottom surface (200) and a concrete layer (220) arranged on the upper end surfaces of the foundation soil layer (210) and the inclined side wall (300), the waterproof part comprises a waterproof layer (230) arranged on the upper end surface of the concrete layer (220) and a waterproof protective layer (240) arranged on the waterproof layer (230), the vibration isolation part comprises a vibration isolation cushion layer (250) arranged on the upper end surface of the waterproof protective layer (240) and a vibration isolation cushion protective layer (260) arranged on the vibration isolation cushion layer (250), be located foundation ditch bottom surface (200) be provided with tower crane foundation (270) on the up end of vibration isolator protective layer (260), tower crane foundation (270) are built in and are had pre-buried festival of tower crane (280), residual space in the foundation ditch is filling layer (290), filling layer (290) parcel lives tower crane foundation (270).
2. The vibration isolation structure of a tower crane foundation according to claim 1, wherein the vibration isolation cushion layer (250) comprises a plurality of vibration isolation pads (251) connected with each other and adhesive plastic tapes (252) arranged between gaps of the adjacent vibration isolation pads (251), a special adhesive (253) is arranged between the upper end surfaces of the adjacent vibration isolation cushion layers (250), and the laying length of the special adhesive (253) is 50mm, so as to limit concrete particles from moving to the gaps of the vibration isolation pads (251).
3. The vibration isolation structure of a tower crane foundation according to claim 1, wherein the internal corners and the external corners of the waterproof protective layer (240) are rhombus-shaped, and the surface of the waterproof protective layer (240) is a smooth plane for limiting the permeation of underground water to the vibration isolation cushion layer (250).
4. The vibration isolation structure of a tower crane foundation according to claim 1, wherein the inclined angle of the inclined side wall (300) is not more than 45 °.
5. The vibration isolation structure of the tower crane foundation according to claim 1, wherein the elevation of the top surface of the tower crane foundation (270) is lower than the height of the top surface (100) of the foundation pit.
6. The vibration isolation structure of the tower crane foundation according to claim 1, wherein the top of the tower crane embedded joint (280) is higher than the top elevation of the raft foundation (400).
7. The vibration isolation structure of the tower crane foundation according to claim 1, wherein the waterproof layer (230) is a polyester-based SBS modified asphalt waterproof coiled material, the vibration isolation cushion layer (250) is made of polyurethane, and the waterproof protective layer (240) and the vibration isolation cushion protective layer (260) are plain concrete C20.
8. A construction method of a vibration isolation structure of a tower crane foundation is characterized by comprising the following steps:
A. excavating a foundation pit of a tower crane foundation (270), controlling the excavation depth within 2m, excavating in layers, measuring data of the foundation pit after finishing one layer, controlling the inclination angle of the inclined side wall (300) at 45 degrees, and setting the slope coefficient at 1: 1;
B. constructing a concrete cushion, namely flattening and compacting the upper surface of a foundation pit soil layer, and then pouring concrete;
C. constructing a waterproof part, namely constructing a water layer and a waterproof protective layer (240) to ensure that the waterproof protective layer (240) is flat and smooth and the water caltrops are clear;
D. constructing a vibration isolation part, namely constructing a vibration isolation cushion layer (250) and a vibration isolation cushion protection layer (260), and tightly pasting splicing gaps of adjacent vibration isolation cushions (251) by adopting adhesive tapes; laying a special adhesive on the upper end surface of the adjacent vibration isolation pad (251), and constructing a vibration isolation pad protective layer (260) after the special adhesive is solidified;
E. constructing a tower crane foundation (270), pouring reinforced concrete of the tower crane foundation (270) when the strength of the vibration isolation pad protective layer (260) reaches 1.2MPA, pre-burying a tower crane joint, and then constructing a raft foundation (400);
F. and (3) constructing a filling layer (290), and adding a filling material into the space below the inner top surface of the foundation pit, so that the construction of the vibration isolation structure of the tower crane foundation is completed.
9. The construction method of the vibration isolation structure of the tower crane foundation (270) according to claim 8, wherein in the step C, the constructor should finish the construction of the waterproof protective layer (240), and polish the concrete after initial setting and before final setting.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210171264.8A CN114525819A (en) | 2022-02-24 | 2022-02-24 | Vibration isolation structure of tower crane foundation and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210171264.8A CN114525819A (en) | 2022-02-24 | 2022-02-24 | Vibration isolation structure of tower crane foundation and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113250224A (en) * | 2021-06-16 | 2021-08-13 | 王晖 | Foundation structure of mountainside building and construction method |
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| CN209227580U (en) * | 2018-11-09 | 2019-08-09 | 北京城建六建设集团有限公司 | The tower-crane foundation structure of raft foundation is placed under a kind of |
| CN209923991U (en) * | 2019-04-10 | 2020-01-10 | 北京市劳动保护科学研究所 | Vibration isolation structure for building foundation |
| CN210887332U (en) * | 2019-07-31 | 2020-06-30 | 上海华跃建筑工程有限公司 | Foundation vibration damping structure of underground building equipment |
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2022
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| JP2000017674A (en) * | 1998-07-03 | 2000-01-18 | Maeda Corp | Base isolation structure of underground structure |
| CN104196059A (en) * | 2014-09-22 | 2014-12-10 | 北京宝曼科技有限公司 | Building foundation vibration isolation system |
| CN208933989U (en) * | 2018-06-29 | 2019-06-04 | 中建二局第三建筑工程有限公司 | A kind of tower-crane foundation structure |
| CN209227580U (en) * | 2018-11-09 | 2019-08-09 | 北京城建六建设集团有限公司 | The tower-crane foundation structure of raft foundation is placed under a kind of |
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| CN113250224A (en) * | 2021-06-16 | 2021-08-13 | 王晖 | Foundation structure of mountainside building and construction method |
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