CN113585358A - Bidirectional adjusting support suitable for piled raft foundation and adjusting method thereof - Google Patents
Bidirectional adjusting support suitable for piled raft foundation and adjusting method thereof Download PDFInfo
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- CN113585358A CN113585358A CN202110947426.8A CN202110947426A CN113585358A CN 113585358 A CN113585358 A CN 113585358A CN 202110947426 A CN202110947426 A CN 202110947426A CN 113585358 A CN113585358 A CN 113585358A
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- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000002955 isolation Methods 0.000 claims abstract description 15
- 239000000956 alloy Substances 0.000 claims abstract description 14
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 14
- 230000033001 locomotion Effects 0.000 claims abstract description 5
- 238000002844 melting Methods 0.000 claims abstract description 5
- 230000008018 melting Effects 0.000 claims abstract description 5
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims abstract description 4
- 238000005485 electric heating Methods 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 12
- 238000000926 separation method Methods 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 238000013016 damping Methods 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 claims description 3
- 230000035939 shock Effects 0.000 abstract description 7
- 238000009413 insulation Methods 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
- E02D27/01—Flat foundations
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
Abstract
The invention discloses a bidirectional adjusting support suitable for a piled raft foundation and an adjusting method thereof. The horizontal shock absorption and isolation support can enable the foundation and the upper structure to generate relative motion during the shock, so that the shock absorption and energy dissipation are effective; the vertical rigidity regulator realizes vertical deformation of the regulator by heating and melting the low-melting-point alloy filled inside, and regulates differential settlement of buildings. According to the pile-raft foundation horizontal ball shock insulation and post-earthquake vertical settlement repairing adjusting support, the horizontal deformation of an earthquake is resisted in the horizontal direction during earthquake, and earthquake damage to a high-rise building is effectively reduced; and the differential settlement of the building is leveled after the earthquake, so that the normal use of the building after the disaster is ensured.
Description
Technical Field
The invention belongs to the technical field of building pile foundations, and relates to a bidirectional adjusting support suitable for a piled raft foundation and an adjusting method thereof.
Background
China is located between two earthquake zones in the world, namely the Pacific earthquake zone and the Eurasian earthquake zone, and earthquake fracture zones are very active under the extrusion of Pacific plates, Indian plates and Philippine sea plates. In China, large earthquakes such as the great earthquake of Tangshan, the great earthquake of Wenchuan and the like cause huge casualties and property loss, so that the adoption of certain shockproof and disaster reduction measures has very important significance.
In severe earthquakes, various buildings are subject to different levels of damage, such as house collapse, bridge breakage, dam cracking, rail deformation, and the like. Engineering damage caused by a strong earthquake can cause the redistribution of internal force or stress concentration of a building structure, and cause the failure and the damage of a foundation. Even a minor earthquake can cause cracks and other internal damage to the building, which in turn affects the life and safety of the building. The problems of reducing the deformation damage degree of the earthquake to the building and repairing after the earthquake are to be solved urgently.
In earthquake fortification areas, according to the requirements of earthquake insulation design, the traditional piled raft foundation is usually subjected to earthquake insulation by adopting a single and fixed earthquake insulation and reduction technology. The horizontal shear damage caused by earthquake is resisted by arranging the seismic isolation layer consisting of the seismic isolation support at the bottom of the piled raft foundation of the high-rise building. Although the earthquake damage to the superstructure by an earthquake can be reduced to a certain extent, and the building is prevented from collapsing, the earthquake often causes differential settlement of the piled raft foundation of the building, so that the building is inclined to generate cracks, and the normal use of the building after the disaster is seriously influenced. The traditional horizontal seismic isolation and reduction support does not consider the function of adjusting vertical uneven settlement at the bottom of a post-disaster building, and even if the structural integrity of the building is ensured in an earthquake, the use function cannot be met, so that the repairing cost is extremely high, even the building can be directly abandoned, and huge waste is caused.
Disclosure of Invention
Aiming at the defects of the technology, the invention arranges the bidirectional adjusting support suitable for the piled raft foundation and the adjusting method thereof between the pile top and the raft, the bidirectional adjusting support suitable for the piled raft foundation can realize shock absorption and energy dissipation when an earthquake occurs, and can restore the differential settlement of a building through a plurality of vertical rigidity adjusters arranged between the pile top of the high-rise piled raft building foundation and the interface of the raft after the earthquake to ensure the normal use, thereby realizing the energy dissipation during the earthquake and the restoration after the earthquake.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
the utility model provides a two-way regulation support suitable for piled raft foundation all sets up a set of between every stake of high-rise piled raft building foundation and raft interface, and every group is applicable to piled raft foundation's two-way regulation support and includes:
the level is to subtracting isolation bearing and being located the level is to subtracting the vertical rigidity regulator on isolation bearing upper portion, wherein, the level includes to subtracting isolation bearing:
the upper bottom surface of the connecting plate is connected with the upper structure, and the lower bottom surface of the connecting plate is provided with a first connecting concave plate;
the bottom plate is positioned below the connecting plate, and the upper bottom surface of the bottom plate is provided with a second connecting concave plate;
a first arc-shaped concave surface is formed on the lower surface of the first connecting concave plate, a second arc-shaped concave surface is formed on the upper surface of the second connecting concave plate, and the first arc-shaped concave surface and the second arc-shaped concave surface are symmetrically arranged up and down to form a separation cavity;
the steel ball is arranged in the separation cavity between the first arc-shaped concave surface and the second arc-shaped concave surface, and the first connecting concave plate and the second connecting concave plate can realize relative movement in the horizontal direction under the support of the steel ball; (ii) a
The vertical rigidity adjuster includes:
the first cylindrical support is vertically arranged above the connecting plate;
the second cylindrical support is coaxially arranged inside the first cylindrical support, a ring groove is formed among the first cylindrical support, the second cylindrical support and the connecting plate, and an electric heating unit and low-melting-point alloy are sequentially arranged in the ring groove from the bottom to the top;
the upper cover plate is positioned at the uppermost part of the vertical rigidity regulator, and the lower bottom surface of the upper cover plate is provided with an annular support which is inserted into the annular groove and is in compression connection with the low-melting-point alloy;
a guide hole is formed in the cylinder wall of the second cylindrical support and communicates the annular groove with the inner cavity of the second cylindrical support;
the stress detection unit is used for detecting the compressive stress applied to the bidirectional adjusting support suitable for the piled raft foundation;
and a signal receiving end of the controller is connected with the stress detection unit, and a signal transmitting end of the controller is connected with the electric heating unit.
Four separation cavities are formed between the first arc-shaped concave surface and the second arc-shaped concave surface, and one steel ball is placed in each separation cavity.
Still include the spring cable, the spring cable sets up between two connection concave plates, the spring cable is used for preventing when the pellet horizontal slip from separate the slippage in the chamber.
The electric heating units are resistance wire electric heating units which are uniformly arranged at the bottom of the low-melting-point alloy.
The stress detection unit is a stress sensor arranged between the upper cover plate and the raft plate.
And a plurality of the guide holes are uniformly formed in the cylinder wall of the second cylindrical support along the circumferential direction.
The device is characterized by further comprising viscous damping material injection equipment, wherein a grouting channel is formed in the side wall of the first connecting concave plate or the side wall of the second connecting concave plate, and a viscous damping material injection end of the viscous damping material injection equipment is connected with the separation cavity through the grouting channel.
The invention further discloses an adjusting method of the bidirectional adjusting support suitable for the piled raft foundation, which comprises the following steps of:
the method comprises the following steps: when an earthquake occurs, the steel ball begins to roll, the upper building and the piled raft foundation move relatively, the upward transmission and the downward feedback of earthquake energy are limited, and the self-vibration period of the structure is prolonged, so that the earthquake effect is reduced;
step two: after the earthquake is finished, the controller receives the pile top stress detected by the stress detection unit, compares the pile top stress with the preset stress in the controller, judges which parts at the bottom of the upper building generate uneven settlement and needs to be vertically adjusted, and starts the electric heating unit in the vertical rigidity adjuster at the corresponding position at the bottom of the upper building if necessary, so that the low-melting-point alloy is uniformly melted after reaching the melting point and flows into the inner cavity of the second cylindrical support through the guide-out hole, the upper cover plate at the upper part is driven to descend, the function of adjusting the vertical rigidity is realized, the differential settlement of the building is adjusted in a large area, and the normal use of the building is ensured.
The invention has the beneficial effects that:
compared with the prior art, the invention has the following advantages:
1. and adjusting the horizontal rigidity of the building by using the shock absorption and isolation function part of the adjusting support. And the horizontal shear damage of the building is reduced in case of earthquake.
2. The coupling seismic mitigation and isolation support and the vertical rigidity regulator form an integrated support, so that the differential settlement regulation of the building after the earthquake is realized
3. The ball shock insulation support and the vertical rigidity regulator are convenient to manufacture and low in material price. The low cost can be widely used in common high-rise buildings in earthquake-proof defense areas, and the building has strong social and industrial values.
Drawings
Fig. 1 is a cross-sectional view of a bi-directional adjusting support suitable for use in a piled raft foundation according to the present invention;
fig. 2 is a front view of a bidirectional adjusting support suitable for use in a piled raft foundation according to the invention;
fig. 3 is a schematic structural view of a bidirectional adjusting support suitable for a piled raft foundation according to the present invention;
list of reference numerals:
the device comprises an upper cover plate 1, an annular support 1-1, a first cylindrical support 2-1, a second cylindrical support 2-2, low-melting-point alloy 3, an electric heating unit 4, a leading-out hole 5, a connecting plate 6, a first connecting concave plate 7-1, a second connecting concave plate 7-2, a grouting channel 8, a steel ball 9, a bottom plate 10 and a spring inhaul cable 11.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the drawings and specific examples.
As shown in fig. 1~3, a two-way regulation support suitable for piled raft foundation all sets up a set of between every stake and raft interface of high-rise piled raft building foundation, and every group is suitable for two-way regulation support of piled raft foundation and includes:
the level is to subtracting isolation bearing and being located the level is to subtracting the vertical rigidity regulator on isolation bearing upper portion, wherein, the level includes to subtracting isolation bearing:
the upper bottom surface of the connecting plate 6 is connected with the upper structure, and the lower bottom surface is provided with a first connecting concave plate 7-1;
the bottom plate 10 is positioned below the connecting plate, and the upper bottom surface of the bottom plate is provided with a second connecting concave plate 7-2;
a first arc-shaped concave surface is formed on the lower surface of the first connecting concave plate 7-1, a second arc-shaped concave surface is formed on the upper surface of the second connecting concave plate 7-2, and the first arc-shaped concave surface and the second arc-shaped concave surface are symmetrically arranged up and down to form a separation cavity;
the steel ball 9 is arranged in the separation cavity between the first arc-shaped concave surface and the second arc-shaped concave surface;
the vertical rigidity adjuster includes:
the first cylindrical support 2-1 is vertically arranged above the connecting plate 6;
the second cylindrical support 2-2 is coaxially arranged inside the first cylindrical support 2-1, a ring groove is formed among the first cylindrical support 2-1, the second cylindrical support 2-2 and the connecting plate 6, and an electric heating unit 4 and a low-melting-point alloy 3 are sequentially arranged in the ring groove from the bottom to the top;
the upper cover plate 1 is positioned at the uppermost part of the vertical rigidity regulator, the lower bottom surface of the upper cover plate 1 is provided with an annular support 1-1, and the annular support 1-1 is inserted into the annular groove and is in compression connection with the low-melting-point alloy 3;
a guide-out hole 5 is formed in the wall of the second cylindrical support 7-2, and the annular groove is communicated with the inner cavity of the second cylindrical support 7-2 through the guide-out hole 5;
the stress detection unit is used for detecting the compressive stress applied to the bidirectional adjusting support suitable for the piled raft foundation;
and a signal receiving end of the controller is connected with the stress detection unit, and a signal transmitting end of the controller is connected with the electric heating unit.
As a preferred embodiment of the present invention, four of the compartments are formed between the first arc-shaped concave surface and the second arc-shaped concave surface, and one of the steel balls is placed in each of the compartments.
As a preferred embodiment of the invention, the device also comprises a spring pull rope, wherein the spring pull rope is arranged between the two connecting concave plates and is used for preventing the small ball from slipping out of the separation cavity when sliding horizontally.
As a preferred embodiment of the present invention, the electric heating unit is a resistance wire electric heating unit uniformly arranged at the bottom of the low melting point alloy.
As a preferred embodiment of the present invention, the stress detection unit is a stress sensor disposed between the upper cover plate and the raft.
In a preferred embodiment of the present invention, the cylindrical wall of the second cylindrical support is uniformly provided with a plurality of the outlet holes along the circumferential direction.
As a preferred embodiment of the present invention, the damping material injection device further includes a viscous damping material injection device, a grouting passage is opened on a side wall of the first connecting concave plate or a side wall of the second connecting concave plate, and a viscous damping material injection end of the viscous damping material injection device is connected to the compartment through the grouting passage.
The invention relates to a work flow of a bidirectional adjusting support suitable for a piled raft foundation, which comprises the following steps:
1. when an earthquake comes, the steel ball 8 starts to roll, the upper building and the foundation relatively move, the upward transmission and the downward feedback of earthquake energy are limited, the natural vibration period of the structure is prolonged, and the earthquake effect is reduced
2. After the earthquake is finished, the controller receives the stress detected by the stress detection unit, compares the stress with the stress preset in the controller, judges which parts at the bottom of the upper building generate uneven settlement and needs to be vertically adjusted, and starts the electric heating unit in the vertical rigidity adjuster at the corresponding position at the bottom of the upper building if necessary, so that the low-melting-point alloy is uniformly melted after reaching the melting point and flows into the inner cavity of the second cylindrical support through the guide-out hole, the upper cover plate at the upper part is driven to descend, the deformation function of the adjuster is realized, the differential settlement area of the building is adjusted, and the normal use of the building is ensured.
Claims (8)
1. The utility model provides a bidirectional adjustment support suitable for piled raft foundation, includes the multiunit, all sets up a set ofly between every pile bolck and raft interface of high-rise piled raft building foundation, its characterized in that, every group is applicable to piled raft foundation's bidirectional adjustment support and includes:
the level is to subtracting isolation bearing and being located the level is to subtracting the vertical rigidity regulator on isolation bearing upper portion, wherein, the level includes to subtracting isolation bearing:
the upper bottom surface of the connecting plate is connected with the upper structure, and the lower bottom surface of the connecting plate is provided with a first connecting concave plate;
the bottom plate is positioned below the connecting plate, and the upper bottom surface of the bottom plate is provided with a second connecting concave plate;
a first arc-shaped concave surface is formed on the lower surface of the first connecting concave plate, a second arc-shaped concave surface is formed on the upper surface of the second connecting concave plate, and the first arc-shaped concave surface and the second arc-shaped concave surface are symmetrically arranged up and down to form a separation cavity;
the steel ball is arranged in the separation cavity between the first arc-shaped concave surface and the second arc-shaped concave surface, and the first connecting concave plate and the second connecting concave plate can realize relative movement in the horizontal direction under the support of the steel ball;
the vertical rigidity adjuster includes:
the first cylindrical support is vertically arranged above the connecting plate;
the second cylindrical support is coaxially arranged inside the first cylindrical support, a ring groove is formed among the first cylindrical support, the second cylindrical support and the connecting plate, and an electric heating unit and low-melting-point alloy are sequentially arranged in the ring groove from the bottom to the top;
the upper cover plate is positioned at the uppermost part of the vertical rigidity regulator, and the lower bottom surface of the upper cover plate is provided with an annular support which is inserted into the annular groove and is in compression connection with the low-melting-point alloy;
a guide hole is formed in the cylinder wall of the second cylindrical support and communicates the annular groove with the inner cavity of the second cylindrical support;
the stress detection unit is used for detecting the compressive stress applied to the bidirectional adjusting support suitable for the piled raft foundation;
and the signal receiving end of the controller is connected with the stress detection unit, and the signal transmitting end of the controller is connected with the electric heating unit.
2. The bidirectional adjusting support suitable for a piled raft foundation according to claim 1, wherein four said compartments are formed between the first arc-shaped concave surface and the second arc-shaped concave surface, and one said steel ball is placed in each said compartment.
3. The bidirectional adjusting support suitable for a piled raft foundation of claim 1, further comprising a spring stay, wherein the spring stay is arranged between the two connecting concave plates, and the spring stay has an energy dissipation and resetting function and is used for preventing the small ball from slipping out of the separation cavity when sliding horizontally.
4. The bidirectional adjusting support suitable for use in a piled raft foundation of claim 1, wherein: the electric heating units are resistance wire electric heating units which are uniformly arranged at the bottom of the low-melting-point alloy.
5. The bidirectional adjusting support suitable for use in a piled raft foundation of claim 1, wherein: the stress detection unit is a stress sensor arranged between the upper cover plate and the raft plate.
6. The bidirectional adjusting support suitable for use in a piled raft foundation of claim 1, wherein: and a plurality of the guide holes are uniformly formed in the cylinder wall of the second cylindrical support along the circumferential direction.
7. The bidirectional adjusting support suitable for use in a piled raft foundation of claim 1, wherein: the device is characterized by further comprising viscous damping material injection equipment, wherein a grouting channel is formed in the side wall of the first connecting concave plate or the side wall of the second connecting concave plate, and a viscous damping material injection end of the viscous damping material injection equipment is connected with the separation cavity through the grouting channel.
8. An adjusting method of a bidirectional adjusting support suitable for a piled raft foundation according to any one of claims 1 to 7, comprising the following steps:
the method comprises the following steps: when an earthquake occurs, the steel ball starts to roll under the action of horizontal force, the upper building and the piled raft foundation generate relative motion, the earthquake energy is consumed through the relative motion to limit the upward transmission and the downward feedback of the earthquake energy, the natural vibration period of the structure is prolonged, and the earthquake effect is reduced;
step two: after the earthquake is finished, the controller receives the pile top stress detected by the stress detection unit, compares the pile top stress with the preset stress in the controller, judges which parts at the bottom of the upper building generate uneven settlement and needs to be vertically adjusted, and starts the electric heating unit in the vertical rigidity adjuster at the corresponding position at the bottom of the upper building if necessary, so that the low-melting-point alloy is uniformly melted after reaching the melting point and flows into the inner cavity of the second cylindrical support through the guide-out hole, the upper cover plate at the upper part is driven to descend, the function of adjusting the vertical rigidity is realized, the differential settlement of the building is adjusted in a large area, and the normal use of the building is ensured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110947426.8A CN113585358A (en) | 2021-08-18 | 2021-08-18 | Bidirectional adjusting support suitable for piled raft foundation and adjusting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110947426.8A CN113585358A (en) | 2021-08-18 | 2021-08-18 | Bidirectional adjusting support suitable for piled raft foundation and adjusting method thereof |
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| CN113585358A true CN113585358A (en) | 2021-11-02 |
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| CN202110947426.8A Pending CN113585358A (en) | 2021-08-18 | 2021-08-18 | Bidirectional adjusting support suitable for piled raft foundation and adjusting method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201730196U (en) * | 2010-07-16 | 2011-02-02 | 青岛理工大学 | Ball disc spring vibration isolation device |
| DE102010019659A1 (en) * | 2010-04-30 | 2011-11-03 | Said Molavi | Rolling system for use in biaxial earthquake damper for damping seismic collision in building, has base arranged parallel to line, where rolling mechanisms of damper are resonated, and rolling path is determined according to size of damper |
| CN103541377A (en) * | 2013-10-30 | 2014-01-29 | 南京工业大学 | Overall process controllable type displacement adjustment device |
| CN210916979U (en) * | 2019-09-03 | 2020-07-03 | 哈尔滨工业大学（深圳） | TMD device for realizing frequency self-tuning through shear thickening damping fluid |
| CN212358395U (en) * | 2020-04-28 | 2021-01-15 | 李雪菁 | Building engineering foundation earthquake-resistant structure |
-
2021
- 2021-08-18 CN CN202110947426.8A patent/CN113585358A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010019659A1 (en) * | 2010-04-30 | 2011-11-03 | Said Molavi | Rolling system for use in biaxial earthquake damper for damping seismic collision in building, has base arranged parallel to line, where rolling mechanisms of damper are resonated, and rolling path is determined according to size of damper |
| CN201730196U (en) * | 2010-07-16 | 2011-02-02 | 青岛理工大学 | Ball disc spring vibration isolation device |
| CN103541377A (en) * | 2013-10-30 | 2014-01-29 | 南京工业大学 | Overall process controllable type displacement adjustment device |
| CN210916979U (en) * | 2019-09-03 | 2020-07-03 | 哈尔滨工业大学（深圳） | TMD device for realizing frequency self-tuning through shear thickening damping fluid |
| CN212358395U (en) * | 2020-04-28 | 2021-01-15 | 李雪菁 | Building engineering foundation earthquake-resistant structure |
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Application publication date: 20211102 |
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