CN111270709B - Energy absorption device for protecting building safety in reverse fault - Google Patents
Energy absorption device for protecting building safety in reverse fault Download PDFInfo
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- CN111270709B CN111270709B CN202010085752.8A CN202010085752A CN111270709B CN 111270709 B CN111270709 B CN 111270709B CN 202010085752 A CN202010085752 A CN 202010085752A CN 111270709 B CN111270709 B CN 111270709B
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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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Abstract
The invention discloses an energy absorption device for protecting the safety of a building in a reverse fault, which comprises at least one energy absorption unit connected into a whole, wherein the energy absorption unit comprises an elastic steel plate, a compression spring and a device bottom plate formed by splicing a first bottom plate and a second bottom plate, and the inclination angle of an inclined plane in contact with the first bottom plate and the second bottom plate is the same as the inclination angle of the fault; the thickness t of the bottom plate of the device is larger than Lsin theta, L is the fault dislocation amount, and theta is the fault inclination angle; one side of the first bottom plate and one side of the second bottom plate, which are deviated from the inclined planes of the first bottom plate and the second bottom plate, are connected with side concrete walls which extend upwards, one side concrete wall is installed at the top of the other side concrete wall, one end of the elastic steel plate is connected to the device bottom plate, the other end of the elastic steel plate is connected with the force transmission block, one end of the compression spring is connected with the inner bottom surface of the top concrete wall, and the other end of the compression spring is connected with the top surface of the force transmission block.
Description
Technical Field
The invention relates to an energy absorption device, in particular to an energy absorption device for protecting the safety of a building in a reverse fault.
Background
With the earthquake active period in China, a large number of built tunnels are threatened by fault disasters. The large-span structure of the tunnel inevitably passes through the earthquake active fault zone because a large number of faults are temporarily undetected, fault dislocation is not easy to predict, and the tunnel route selection is influenced by the landform factors. The tunnel is located below the earth surface and is restrained by surrounding strata, and the tunnel has high shock resistance. However, the conventional post-earthquake observation shows that the tunnel is easily damaged by fault dislocation, and the life and property safety is seriously threatened. However, there is no mature and effective tunnel anti-fault measure, so it is urgently needed to develop new technology to secure the underground structure of the active fault area. In the process of reverse fault dislocation, the soil body is extruded, the mechanical state of the soil body develops towards the passive soil pressure state to form huge energy, and the reverse fault dislocation cannot be strongly resisted under the condition.
Disclosure of Invention
Aiming at the defects in the prior art, the energy absorption device for protecting the safety of the building in the reverse fault can reduce the influence on the tunnel or the building when the fault moves.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that:
an energy absorbing device for protecting building safety in a reverse fault is provided, which includes:
the energy absorption unit comprises an elastic steel plate, a compression spring and a device bottom plate formed by splicing a first bottom plate and a second bottom plate, and the inclination angle of an inclined plane in contact with the first bottom plate and the second bottom plate is the same as the inclination angle of a fault; the thickness t of the bottom plate of the device is larger than Lsin theta, L is the fault dislocation amount, and theta is the fault inclination angle;
one side of the first bottom plate and one side of the second bottom plate, which are deviated from the inclined planes of the first bottom plate and the second bottom plate, are connected with side concrete walls which extend upwards, one side concrete wall is installed at the top of the other side concrete wall, one end of the elastic steel plate is connected to the device bottom plate, the other end of the elastic steel plate is connected with the force transmission block, one end of the compression spring is connected with the inner bottom surface of the top concrete wall, and the other end of the compression spring is connected.
The invention has the main beneficial effects that: when the energy absorption device runs through a fault, the elastic steel plate is pressed to generate elastic deformation, the upper end of the elastic steel plate extends upwards, the compression spring is further compressed, energy generated by fault dislocation is converted into elastic potential energy of the elastic steel plate and the compression spring, the energy absorption device is not damaged, deformation of a soil body on the tunnel or an underground building side can be reduced, and further the tunnel or the underground building is prevented from being influenced by fault dislocation.
When the fault does not generate dislocation, the compression spring above the elastic steel plate can provide downward force for the elastic steel plate so that the elastic steel plate is in close contact with the side concrete walls on two sides and provides outward extrusion force for the side concrete walls, the two side concrete walls are guaranteed not to deform under the extrusion of a soil body, and the stability of the whole energy absorption device is further guaranteed.
The elastic steel plate is arranged between two adjacent isolation columns, and the isolation columns can improve the stability of the side concrete wall and control the extension direction of the elastic steel plate.
Drawings
FIG. 1 is a schematic structural diagram of an energy absorption device for protecting building safety in a stratum in a reverse fault, wherein the energy absorption device is provided with only one energy absorption unit.
Fig. 2 is a diagram of a positional relationship between an energy absorber and a fault tunnel.
FIG. 3 is a cross-sectional view of an energy absorber in a formation.
FIG. 4 is a longitudinal arrangement of an energy absorber device comprising a plurality of energy absorber units.
Wherein, 1, the elastic steel plate; 2. a compression spring; 3. a device chassis; 31. a first base plate; 32. a second base plate; 4. a side concrete wall; 5. a top concrete wall; 6. a force transfer block; 7. an isolation column; 8. a cover plate; 9. a tunnel; 10. and (6) fault breaking.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
As shown in fig. 1, the energy absorption device for protecting building safety in the ground in the reverse fault 10 comprises at least one energy absorption unit connected into a whole, wherein the energy absorption unit comprises an elastic steel plate 1, a compression spring 2 and a device bottom plate 3 formed by splicing a first bottom plate 31 and a second bottom plate 32, and the inclination angle of the inclined plane of the first bottom plate 31 contacted with the second bottom plate 32 is the same as that of the fault 10; the thickness t of the device bottom plate 3 is larger than Lsin theta, L is the dislocation amount of the fault 10, and theta is the inclination angle of the fault 10.
One side of the first bottom plate 31 and the second bottom plate 32 deviating from the inclined plane thereof is connected with a side concrete wall 4 extending upwards, a top concrete wall 5 is installed at the top of one side concrete wall 4 (the top concrete wall 5 needs to have enough thickness and can resist the elastic force generated by the compression spring), one end of an elastic steel plate 1 is connected on the device bottom plate 3, the other end of the elastic steel plate is connected with a force transmission block 6, one end of a compression spring 2 is connected with the inner bottom surface of the top concrete wall 5, and the other end of the compression spring is connected with the top surface of the force transmission block 6.
The force transfer block 6 is not connected with the side concrete wall 4, and when the fault 10 is dislocated, the pressing spring can carry the force transfer block 6 to freely stretch.
Because the first mounting plate and the second mounting plate are only contacted, no connection relation exists, when the fault 10 is dislocated, the dislocation can be blocked by the unfixed first mounting plate and the unfixed second mounting plate, and the dislocation only occurs on one side of the energy absorption device.
When the fault 10 is dislocated, the first bottom plate 31/the second bottom plate 32 can drive corresponding components mounted on the first bottom plate to slide upwards along the inclined surface, the elastic steel plate 1 is pressed to generate elastic deformation, and the elastic steel plate 1 and the compression spring 2 are matched to convert energy generated by the dislocation of the fault 10 into elastic potential energy of the elastic steel plate 1 and the compression spring.
In addition, because the thickness t of the bottom plate 3 of the device is larger than Lsin theta, when the fault 10 is dislocated, the first bottom plate 31 and the second bottom plate 32 cannot be completely dislocated, and the first bottom plate 31 and the second bottom plate 32 can still be in close contact under the action of soil body pressure, so that the bottom of the energy absorption device can still be sealed after the fault 10 is dislocated, and the condition of water leakage cannot occur.
In practice, as shown in fig. 2 and 3, the present embodiment is preferably implemented with the first bottom plate 31 facing downward, the second bottom plate 32 facing upward, and the top concrete wall 5 attached to the side concrete walls 4 on the second bottom plate 32.
After the inclined plane adopts the arrangement mode, when the energy absorption device is installed, the first bottom plate 31 is always installed on the upward movement side of the fault 10, so that when the fault 10 moves, deformation generated by dislocation of the fault 10 can be converted into elastic potential energy of the elastic steel plate 1 and the compression spring, a soil body on the side where the second installation plate is located cannot move upwards, and the tunnel 9 or a building can be better protected.
The length of the first bottom plate 31 is smaller than that of the second bottom plate 32, so that the extrusion deformation of the elastic steel plate 1 during dislocation can be reduced, the deformation generated by dislocation of the fault 10 can be quickly converted, and the influence of dislocation on the non-rising side of the soil body is reduced.
Referring again to fig. 1, the resilient steel plate 1 is disposed between two side concrete walls 4 in an elliptical wave shape, and all peaks and valleys of the resilient steel plate 1 are in contact with one side concrete wall 4, respectively. After the elastic steel plate 1 adopts the structure, the sliding deformation of the elastic steel plate in the area formed by the two side concrete walls 4 can be facilitated, the deformation generated by the fault 10 is quickly converted into elastic potential energy, and the elastic steel plate 1 and the compression spring are driven to move up and down back and forth to be consumed.
As shown in fig. 2, the side surface of the same side of the two side concrete walls 4 is connected with an isolation column 7 for limiting the elastic steel plate 1, and a spacing distance B > Lcos θ exists between the two isolation columns 7. The two isolation columns 7 can improve the stability of the concrete wall, and can limit the elastic steel plate 1 and the force transfer block 6 in the groove, so that the two can only slide in the vertical direction.
The longitudinal section S of the elastic steel plate 1 is (2B + B), B is the width of the isolation column 7, and B is the separation distance between two isolation columns 7. The unique setting of the longitudinal section of the elastic steel plate 1 enables the wave crests and the wave troughs of the elastic steel plate 1 to be in contact with the side concrete wall 4, an outward force is given to the side concrete wall 4, the side concrete wall 4 is prevented from collapsing under the extrusion of a soil body, and the energy generated by the dislocation of the fault 10 can be absorbed.
The energy absorption device for protecting the building safety in the stratum in the reverse fault 10 further comprises a cover plate 8 which is placed at the top of the energy absorption device (the cover plate 8 and two pieces of side concrete do not have a connection relation) and is used for filling and sealing the energy absorption device. When the energy absorption device is installed, the cover plate 8 is level with the ground, so that the ground traffic can run conveniently before the fault 10 moves in a dislocation way.
When the energy-absorbing device comprises at least two energy-absorbing units, as shown in fig. 4, the first base plate 31, the second base plate 32 and the side concrete wall 4 of two adjacent energy-absorbing units are connected into a whole. Since the tunnel 9 or the building generally has a relatively large length passing through the fault 10, the energy absorbing device is generally composed of a plurality of energy absorbing units when in use.
When the energy absorption device is designed, the design value L of the fault 10 dislocation quantity selected by the scheme is 1m, the fault 10 dip angle theta is 60 degrees, the width design value of the isolation column 7 is 0.5m, and the parameters are set so that:
the spacing distance B between the two separation columns 7 is larger than Lcos theta which is 1 × cos60 degrees which is 0.5m, and the preferable B in the scheme is 1 m; the longitudinal section S of the elastic steel plate 1 is 2B + B2 × 0.5+1 2 m; the thickness t > lssin θ of the device bottom plate 3 is 1 × sin60 ° -0.87 m, and t in this embodiment is preferably 1 m.
Claims (8)
1. An energy absorbing device for protecting building safety in a reverse fault, comprising:
the energy absorption unit comprises an elastic steel plate, a compression spring and a device bottom plate formed by splicing a first bottom plate and a second bottom plate, and the inclination angle of an inclined plane in contact with the first bottom plate and the second bottom plate is the same as the inclination angle of a fault; the thickness t of the bottom plate of the device is larger than Lsin theta, L is the fault dislocation amount, and theta is the fault inclination angle;
one side of the first bottom plate and one side of the second bottom plate, which are deviated from the inclined planes of the first bottom plate and the second bottom plate, are connected with side concrete walls which extend upwards, a top concrete wall is installed at the top of one side concrete wall, one end of the elastic steel plate is connected to the device bottom plate, the other end of the elastic steel plate is connected with the force transmission block, one end of the compression spring is connected with the inner bottom surface of the top concrete wall, and the other end of the compression spring is connected with the top surface of the force transmission block.
2. The energy absorbing device for protecting the safety of buildings in the reverse fault according to claim 1, wherein the elastic steel plate is arranged between two side concrete walls in an elliptical wave shape, and all the wave crests and wave troughs of the elastic steel plate are respectively in contact with one side concrete wall.
3. The energy absorption device for protecting the safety of buildings in the reverse fault according to claim 2, wherein the side surface of the same side of the two side concrete walls is connected with an isolation column for limiting the elastic steel plate, and a spacing distance B > Lcos theta exists between the two isolation columns.
4. The energy absorbing device for protecting the safety of buildings in the reverse fault is characterized in that the longitudinal section S of the elastic steel plate is (2B + B), B is the width of the isolation column, and B is the spacing distance between two isolation columns.
5. The energy absorber for protecting the safety of a building in a reverse fault of claim 1, wherein the first floor has a downward slope and the second floor has an upward slope, and the top concrete wall is connected to the side concrete walls on the second floor.
6. The energy absorbing device for protecting building safety in a reverse fault according to claim 5, wherein the length of the first floor is smaller than the length of the second floor.
7. The energy absorbing device for protecting the safety of buildings in the reverse fault is characterized by further comprising a cover plate which is placed on the top of the energy absorbing device and used for filling the energy absorbing device.
8. The energy absorbing device for protecting the safety of buildings in the reverse fault according to any one of claims 1 to 7, characterized in that when at least two energy absorbing units are included, the first bottom plate, the second bottom plate and the side concrete wall of the two adjacent energy absorbing units are connected into a whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010085752.8A CN111270709B (en) | 2020-02-11 | 2020-02-11 | Energy absorption device for protecting building safety in reverse fault |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010085752.8A CN111270709B (en) | 2020-02-11 | 2020-02-11 | Energy absorption device for protecting building safety in reverse fault |
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| CN111270709A CN111270709A (en) | 2020-06-12 |
| CN111270709B true CN111270709B (en) | 2021-07-20 |
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| CN202010085752.8A Active CN111270709B (en) | 2020-02-11 | 2020-02-11 | Energy absorption device for protecting building safety in reverse fault |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115075306A (en) * | 2022-07-05 | 2022-09-20 | 四川省交通运输发展战略和规划科学研究院 | Partition wall structure for protecting building safety in normal fault and construction method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04312607A (en) * | 1991-04-11 | 1992-11-04 | Taisei Corp | Vibration-damping structure for ground |
| JPH10237882A (en) * | 1997-02-24 | 1998-09-08 | Yoshinori Suzuki | Foundation constructing method for damping earthquake-induced motion of building |
| CN102704509A (en) * | 2012-05-15 | 2012-10-03 | 西南交通大学 | Buffer layer structure below built structure on hidden reverse fault and construction method thereof |
| JP2015055147A (en) * | 2013-09-13 | 2015-03-23 | 清水建設株式会社 | Underground base isolation wall structure and construction method for the same |
| CN204803924U (en) * | 2015-04-20 | 2015-11-25 | 华北水利水电大学 | Basis isolating device |
| CN108086367A (en) * | 2018-01-08 | 2018-05-29 | 华侨大学 | Prevent and reduce natural disasters structure and its construction method of nearly tomography multi-column pier foundation |
-
2020
- 2020-02-11 CN CN202010085752.8A patent/CN111270709B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04312607A (en) * | 1991-04-11 | 1992-11-04 | Taisei Corp | Vibration-damping structure for ground |
| JPH10237882A (en) * | 1997-02-24 | 1998-09-08 | Yoshinori Suzuki | Foundation constructing method for damping earthquake-induced motion of building |
| CN102704509A (en) * | 2012-05-15 | 2012-10-03 | 西南交通大学 | Buffer layer structure below built structure on hidden reverse fault and construction method thereof |
| JP2015055147A (en) * | 2013-09-13 | 2015-03-23 | 清水建設株式会社 | Underground base isolation wall structure and construction method for the same |
| CN204803924U (en) * | 2015-04-20 | 2015-11-25 | 华北水利水电大学 | Basis isolating device |
| CN108086367A (en) * | 2018-01-08 | 2018-05-29 | 华侨大学 | Prevent and reduce natural disasters structure and its construction method of nearly tomography multi-column pier foundation |
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